[DeTomaso] final verduct on self-tuning fuel injection

Justin Greisberg justingreisberg at hotmail.com
Tue Oct 4 14:11:41 EDT 2011



The company is professional products.  Their powerjection systems are sold all over.  The final word from the fuel injection guys there is basically that I must be doing something wrong, even though no one there can give me a clue which direction to go.  they are willing to offer me a moderate discount on a new system, but will not trade this one in.  they won't even take it back to try it on their test engine.  Partly it is because the company was bought over by professional products right after I bought the system, and the new parent company is a giant organization with mediocre customer service.
 
I would never do fuel injection again.  If it works, it is a wonderful thing.  But every time I try to play with it, it starts rich and my plugs get carbon fouled, and my fancy yellow monza exhaust pipes become all black.  And someone told me if I keep running it rich I might ruin the rings on my new engine.
 
So much as I hate to not fix something (this would be the first car problem I have not fixed myself), I may have to suck it up and just give up.
 
justin




---- Justin Greisberg <justingreisberg at hotmail.com> wrote:
>
> Everyone might be sick by now of hearing my ongoing troubles with EFI, but I am hoping I can help save someone else the pain. $2500, 2 years of tuning, well over 100 miles of driving a car in circles around the block. Have come to a point where problem can not be fixed by me. I have professional products retrotek powerjection 1 system. Older system (2 years) but the techs at the company can not offer me any help. Can not fix driveability issues (goes way lean under mild acceleration, so accelerating from a stop light leads to severe bogging and just about stalling in the middle of an intersection.) I have asked for a refund or a free upgrade to their new system, powerjection 3, so that maybe they can provide better tech support (which would be a downgrade since new system is cheaper than old system), but they stopped returning my calls.
>
> I have a 351 cleveland with CHI heads, roller cam, CHI intake. makes 8-12 inches vacuum at idle, which makes it harder for fuel injection system to work.
>
> I now am throwing away the entire system and starting over with a carb. Have to redo entire fuel system to non-EFI pump. close to $1000 to spend on carb and fuel pump and plumbing now. Totally disgusted. I am not made of money, and my hobby has become a source of endless stress. The EFI was supposed to make cold starting easier, but never worked properly. Was supposed to just start right up when you turn the key. well, sometimes it does. cold idling was supposed to be better than an electric choke. Doesn't do it, though. Was supposed to make driving better, but just fouled multiple spark plugs and totally carbon fouled the combustion chambers of my new heads and engine. Was supposed to be easily tuneable by computer, but not so easy, even for a knowledgeable person like me. If anyone has questions about these issues, feel free to ask me, since I understand these issues well. It is just that this system doesn't work as designed.
>
> I know others have found some success with these systems, but I strongly recommend staying away. Others have said I should just find a tuner - but I don't know how much more time I can give this. I have a job, and taking a day off from work to go to some tuner (flatbed the car who knows where!) becomes an expensive option for a system that is clearly advertised as just put it on and drive! And if the techs at the company can't fix it, then why would anyone else be able to???
>
> Anyone want to buy a slightly used EFI system? for sale, cheap? NO REFUNDS justin
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