TABLE OF CONTENTS
Introduction
New Developments
Systems and Accessories That I Sell And Pricing Information
Contact CustomEFIS and Order a System
Customer Testimonials and Special Projects
General Information About GM Fuel Injection
Results From A Kentucky Emissions Test With a GM TBI EFI Kit
Advanced GM Fuel Injection Topics
About CustomEFIS and Links to My Favorite EFI Sites
Disclaimer and Limitations of Liability
This Website Design
Introduction To CUSTOMEFIS
Welcome to CustomEFIS. This site is all about GM (General Motors) Electronic Fuel Injection System retrofit kits. I sell GM EFI conversion kits for older carbureted engines as well as tune systems that are factory installed up through 1995. Although you can attempt to build a GM EFI system completely by yourself, you'll get a better quality system and be driving your vehicle much faster with one of my kits. In the past I sold used GM TBIs and other used parts to keep prices down. I abandoned that strategy as it wasn't viable as a profitable business model for the long term since used parts were not reliably available in the quantities that I needed. I then sold only new parts but prices went considerably higher and many customers could no longer afford the higher system cost. Now, 1) realizing that many customers may have easy access to good used parts; 2) realizing that the only real value that I added was the harness, calibration chip, and other hard to find items specially bought/manufactured for installing the system, and 3) to regain those customers with lower budgets, I am bringing back the used systems but with a catch. I will explain the catch later. I will also sell completely new kits for those who would rather I handle all the details. To accomodate this new change in strategy, I am restructuring my website into two divisions:
The Buy It Now division will contain kits that you can buy today and they will ship the next day or within a few days. This will include universal GM 2bbl TBI kits (most small V8s and V6s) and other kits and products that have been tested on specific vehicles and are in stock and ready to ship.
The Custom EFIS division will be for building new kits on untested vehicles that I have not done before and for used systems in which parts must be found as needed. This division will have no guaranteed shipping deadline (within reason) and the price will be considerably higher and/or quoted individually. Custom work takes longer and costs more money since these are built one at a time. This is typical of any fabricated one of a kind system. Once all issues are worked out on these systems and there proves to be a substantial demand for these type kits, I will create new Buy It Now kits from this work.
Why Should You Buy a GM EFI System?
For those new to this site, here are the strongest selling points of all my systems:
1) I tune the system for you after installation (you and I do this via email; isn't technology awesome!!)
2) All re-newable parts that I use to build my systems can be purchased at any auto parts store for emergency repairs or to keep an inexpensive spare for off-road customers;
3) All my kits are reprogrammable for any engine while driving if desired;
4) I control both fuel and spark with all my systems and they are as close to a factory GM system as you can get for reliability, performance, drivabilty, and serviceability. The control logic in GM ECMs will run your engine smoother and have better drivability than most aftermarket systems.
5) GM ECMs have the best on-board diagnostic systems for troubleshooting. They also have a backup system in case the main CPU of the ECM crashes so that you can get home in the event of an ECM malfunction. Aftermarket systems typically don't have this feature at all.
Lets go over these points. First, aftermarket systems usually require you to study their tuning manual and learn how to program the system yourself. While many enthusiasts want to do that, most of my customers don't have the time to learn how to tune an engine properly and just want the engine up and running as soon as possible. With my kit, I can do the tuning for you. I have years of experience getting my systems tuned quickly so if you happen to be an off-road enthusiast and want to hit the trail ASAP, I'm the way to go. Next, all my kits use either new OEM replacement parts or new or re-manned GM ECMs. This allows you to buy a replacement part at any auto parts store across the USA (and overseas) and get back on the road quickly. With aftermarket systems you have to wait until a weekday and order new parts by phone and then wait for them to arrive by mail. Next, some aftermarket kits are not reprogrammable at all. If your engine does not meet the specifications the aftermarket kit was designed for, the engine will not run correctly. Also you can't upgrade the engine at a later time with a non-programmable system. If you want to reprogram your GM EFI system, then my DIY tuning manual will guide you in the process if you purchase my optional tuning tools. Finally, GM spent millions developing the ECM software to run their vehicles. You really can't get a more reliable system than a GM system. They will perform as good or better than any aftermarket system, they can be serviced by just about any decent garage, and the drivability is better than any system out there. I can honestly say that many of my sales result from customers unhappy with their aftermarket systems for these exact reasons. If price is all you are considering, you need to do some serious comparison shopping.
New Developments
10/01/06 - One of my specialties is making older engines with carburetors pass emissions tests. I have had some customers bring their Jeeps to me from Texas and Tennesee so that I could replace their carburetors with my MPFI kit for Jeep 6 cylinder engines. In the process of installing the MPFI system, I took out all the old emissions systems and replaced them with my MPFI kit. This is not a trivial task. One feature that GM ECMs can do that other aftermarket ECMs can't do is control the charcoal canister purge valve. On a factory Jeep 4.0L with MPFI the air cleaner uses a venturi in the air intake duct to create a vacuum to purge the charcoal canister. When using an aftermarket air cleaner the venturi is not there. By using a GM ECM to control the canister purge valve you can keep the vehicle emissions legal and still use a high performance air cleaner. This is just one example of where a GM ECM does things an aftermarket ECM can't do. If you live in a state where an emissions test is required to get the vehicle tagged and you desperately need to get it passed, and you are failing the test for whatever reason, give me a call. I can get you passed and get you fuel injected at the same time by working with a local mechanic to install my system.
08/22/06 - I am starting a new program for developing EFI kits. If you would like an EFI kit built for your vehicle and can assist with digital photos and dimensions of parts on your vehicle, I would like to work with you to perfect a kit. I will then offer this kit as a tested and tried system if there is a high demand for the kit. The price of your kit will be high, but I will refund half of your cost if the kit results in something I can mass produce and sales allow me to make the refund. I've been building GM EFI kits for years and many times the kit was custom built for a vehicle with no prior experience on that type vehicle. They have always worked well after I tuned them, but the kits required the installer to purchase some minor items on their own and have fabrication skills/tools that some customers didn't have. All future kits will be much more complete and have all the needed parts in the box along with an installation manual for that exact vehicle. In order to do this I need a test vehicle to work out all design and installation issues. You don't have to bring the vehicle to me. All I need is plenty of digital photos and dimensions of your vehicle as needed. Once the kit is built here I will send it to you for installation and then you send more photos for an installation manual.
03/05/05 - There are some new GM EFI products on the market that are so great that I have to make special mention of them here so you won't miss reading about it below. Check out the Real Time Tuning section in the Advanced GM Fuel Injection Topics section of my site below. In over 5 years of experience with GM EFI, I have never seen such a revolutionary product offering.
09/20/04 - I now convert all GM ECMs to flash chip technology. This makes reprogramming GM EFI much less expensive. Check out the Flash Chip Conversion option below.
06/30/07 - I have always tried to provide a better product for less money than my competitors. That has been my business goal from day one. But recently I've had a few customers decide that they are not happy with my products and have threatened to sue me, which concerns me because I do my best given the limitations of time (and money). When you decide to modify your vehicle with a GM EFI system you are making a decision to install a complex technical system onto an older technical system. Older vehicles are not always in the best of shape. Ignition switches can have flaky contacts, engines can have worn rings, cam lobes, valves, etc. Calibrations that work on one engine may not work with another due to the these type wear problems. Ultimately I may have to make a decision to end my relationship with the customer if 1) either he is not willing to work with me to resolve the problems (which can be on his end just as well as mine), or 2) I determine that the customer just does not have the technical expertise or money to pay someone to solve the problems. After consulting with an attorney, it is quite simple. My Disclaimer at the bottom of this page which has remained unchanged from the day I first posted this website, states that my total liability to the customer is the refunding of his money when my parts are returned to me. Talk of sueing me for labor charges and so forth is non-sense since it wasn't my decision to modify your vehicle. At some point I must ask the customer to send back the system for a refund so that I can help other customers who are having greater success with their installations. In the past I have tried to help every single customer, regardless of the situation and length of time, to the detriment of customers with successful installations. That will no longer be the case. From this point on, if problems persist for long periods of time and the customer loses patience, I will have to ask the customer to return the system for a refund and move on. I have many many happy customers, but admittedly a few unsatisfied customers and they are harming my business.
Systems and Accessories That I Sell And Pricing Information
BUY IT NOW Section
This is the Buy It Now section. This section contains kits that have been tested and installed on many vehicles with success. This section also contains my best selling kits. I placed Quick Links to these kits in the Table of Contents but they are relisted below.
When you purchase a kit from this section, the parts will usually be in stock and ready to ship within a few days. I try and maintain parts for these kits in stock. Occasionally I may be out of stock and have to replenish my stock on these parts but it shouldn't take more than a week or two. The harness will be universal but may require a small modification to suit your particular application. For example, you might want me to add an EGR control solenoid. I can do this but it will take a day off the shipping. Also, as explained below, if you provide the parts, I will need to custom program a chip to match your parts. Until you provide information about your parts, I will hold the kit until I can ship all my parts at one time. So check out each package to see what suits your needs. As with all my systems, please email or call me to make sure the kit suits your application.
Custom EFIS Section
This is the Custom EFIS section. This section is quoted and priced individually by email or phone. See "How to Contact CustomEFIS and Order a System" below. These kits may contain used parts depending on your delivery needs and/or budget. Delivery time of these kits is varies greatly as I can only work on them as time allows. These kits are custom built and I have to design the system, have parts manufactured by a CNC shop, and then assemble the system. These cycles must fall in between producing my But It Now kits.
Visit Our Online Store for All Your CustomEFIS Gear!
Contact Customefis and Order A System
Since all of my EFI kits will require co-ordination between the customer and myself, ordering is via Email or phone correspondence. We will discuss your needs and I will suggest a system and/or quote a price based on what you tell me. Although I prefer email over phone calls, I am providing my phone # for those customers who have urgent questions or just feel better talking to me in person. But keep in mind that I may have to ask you to call back when I am not so busy. Also, if you email me and don't get a response, please call before giving up. Computer viruses and spam frequently interfere with my email capability. My phone # is (706) 478-5496.
If you email me and don't get a reply, you may have a spam filter blocking my reply email. I usually answer with the email address "customefis2@aol.com". So if you will add this to permitted emails or turn off your spam filter, my reply will get through. You can also email me directly at customefis2@aol.com
Although I have a money back guarantee, I charge a 25% re-stocking fee to cover my time in taking inventory, re-cleaning, and re-packaging returned systems. This is in addition to charges for items damaged in shipping when they are packaged poorly. I don't have a lot of systems returned, but it costs money when that happens.
GM Fuel Injection Kit Installation Instructions
All customers who purchase a system from me will be given access to the installation instructions after I recieve a deposit on a kit. To access the installation instructions page after getting your username and password, please Click Here.
Customer's Testimonials And Special Projects
General Information About GM Fuel Injection
Results From A Kentucky Emissions Test With My TBI EFI Kit
Here are the results of an emissions test in the state of Kentucky with a CustomEFIS TBI fuel injection kit.
Note that the actual HC level was 15.3 PPM and the PASS Level was 220. The actual HC reading is 7% of the Pass level. Likewise, the CO reading is 0.06% and the PASS level is 1.2%. The actual CO reading is 5% of the PASS level. I would say this Jeep is clean as it could possibly be. If you use a catalytic convertor and your cam is stock, there is no reason you can't get results like this. Non-stock cams won't be as clean as this.
Advanced GM Fuel Injection Topics
Do-It-Yourself Manual
Since it has been 5 years since my DIY manual was first published much of the information contained in the first two chapters is now obsolete. For this reason I have decided to stop selling the manual separately. I am re-writing the manual as a tuning guide to go with the tuning tools I now sell. Older customers will still have access to the manual updates in a password protected section of this site.
If you previously paid for the manual, please Click Here.
About CustomEFIS
My Favorite EFI Links
Disclaimer And Limitations of Liability
Since you are willingly making changes to your vehicles' engine management systems, and are performing the changes yourself, I will not be held liable for damages to your property, health, or life. You should be aware that altering your vehicles' engine management systems may drastically change the manner in which the vehicle performs as compared to how it performed in its stock configuration. You will educate yourself with the information contained herein concerning operating your vehicle with these modifications and you will abide by all warnings about potential problems caused by improper operation. I will not be held liable for any damages caused in any accident in which you were not fully in control of your vehicle. I insist that any adjusting, tuning, or data gathering that you do be done with a partner so that you can concentrate on driving your vehicle. My total liability is the return of your money upon return of the parts contained in my kits.
Also, it is against Federal and state laws to alter your vehicles' emissions controls without a specific CARB exemption for the parts you want to install. Unless you are installing my kits on a vehicle that is exempt from emissions controls due to age, I will assume that you intend to use these parts for OFF-ROAD USE ONLY. The exception to this is if you follow the legal procedures in your state to have any modifications to your vehicle emissions systems approved by an authorized emissions inspections agency. It will be your responsibility to determine what is required to maintain the emissions legality of your vehicle and to seek out agency approval of any emissions modifications. I will not be held liable for your failure to do so.
By purchasing my products, you agree to these terms and responsibilities on your part and waive all rights to seek any form of compensation or restitution from CustomEFIS in a court of law.
This Website Design
I personally wrote this website directly in HTML. I am not a website designer but an engineer. My intent is to provide lots of information to the customer in the fastest and most efficient manner possible. I do not like flashy graphics that do nothing for the content nor do I need a shopping cart since my systems are uniquely tailored to each customers needs. You won't find much chrome in this site. Chrome doesn't make you car go faster or run better. All it does is add to the cost that you pay for the systems you buy. All that flash and those high dollar marketing tricks aren't free. The cost is passed on to YOU. This site is content heavy and I want it that way. I do not want to pay for storage of graphics and photos of chrome that do nothing but slow down access to the info on this site, nor do I want to pay for the bandwidth that the graphics require from my hosting service. Please do not offer to "improve" my website for a fee.
If you have any further questions, please email me.
© 2001, 2002, 2003, 2004, 2005, 2006 CustomEFIS