Ok so I have spent a ton of time and $$ with my fuel injection system on my 91 since my new built last May of 2012. I still haven’t got the car running right. I put about 800 easy miles on the motor since the build but the motor would surge etc and have cold starts and I figured it had to be something with the tune on my pcmforless chip.

Instead of going back and forth with PCM forless and waiting for the mail to go back and forth a few times for re-flashes I decided to go the dynamic efi route. So I bought the dynamic efi installed into one of my space computers to the dyno shop hooked it all up the guy was making a bunch of changes using the new usb cord that was installed on my computer and then about 5hrs into the tuning the computer started smoking.

He believes the computer is still good but has not had time to confirm yet. If this computer is toast I just blew another $500 plus labor to keep the car fuel injected and will now be in the same situation I was last summer which would be surging like crazy and cold starts etc.
What do you guys think about swapping over to a carb?

I know it’s going back in time but I don’t have $2,000 plus tuning for a Holley system to blow on the car this year and I need my car ASAP I can’t waste any more time playing the guessing game with my car the summers are not long up here in new england and I just want my car back and driveable!

Any info would be great!!

Thanks!!

 

similar story here.I know I could make my 383 in my 88 run awsome if
I converted to a carb but mpg would suffer.With gas being as expensive
as it is I keep spending money trying to get the fuel injection "right".Although every time I take my motorcycle for a ride I'm reminded how nice a well tuned carburated engine can run.

 

There are plenty of "Computerized" 383 355 etc.. Out there running great. Find the problem and fix it.It looks to me like you are just guessing and throwing PCMs at this thing. What caused the Dynamic EFI to fail. Did the tuner give you any indication of problems with your vehicle ..vacuum leak etc?

 

Does your tuner know what he's doing? 5 hours on the dyno, and the car is still surging? Could be a vacuum leak which could make tuning an impossible task.

 

5 hrs of programing and setting up the computer etc. he was about to send the flash out when the computer started smoking....if that didnt happen my car would have been all set ....we have checked for vacuum leaks everywhere!!!

 

YOU desparately NEED a new "TUNER"...dude...

thats insane. Somebody does NOT know what he's messing with....I could get that engine running like a friggin Nascar track car with that money thats ALREADY been spent...

EFI is SIMPLE. Its data..info sent to a computer that makes decisions instantly to adjust and run the engine efficiently and maintain the performance. The 'tune' is the set of parameters that it has to go by...like rules.
Your tuner needs to go....not the EFI.

 

The dynamic EFI I got is not a holley or FAST system...its a computer that is attached to the stock computer and converted to a system that can plug into a laptop to tune its not a stand alone system that I have.

 

I am using the dynamic EFI on my 89. (383 converted to speed density) The computer I have replaced the stock computer and even fits in the original carrier. I have self tuned for about a year now learning as I go, and have had only a few problems. I agree with the opinions above!

 

One thing about a carb, u can drive it 1 minute after everything is hooked up.
Wrong carb will net poor mpg.
Holley 4 1 6 5- 6 2 1 0 with matching intake should give ~same mpg as efi, but it is $420, not cheap. And any carb may need a small cooling fan or the carb can boil 30-45 min after shut off.
If you don't know how to work on a carb, it is no advantage; who will fix it ?

 

true on the $$....but I would also have a superram, throttle body, injectors, fuel rail, etc. to sell.....I would really rather stay fuel injected but it is becoming a nightmare...

 

You don't state you location but if you bring it to Hightech Motorsport in MN, they will get it running for you like they did mine.

 

Smoking is not good.

If computer was kaput it would show on the malf area of WU (datalogging system).

Have you spoken to RBob at dynamicefi?

 

I've run the stock cfi, converted to a carb, then a SuperRam and now a Miniram. Stick with the fuel injection. There is a solution. The poster who mentioned the fan with a carb is not far off. There is a reason my car has holes in the hood.

 

i change my 87 vette fuel injection to carb runs great but its not shifting from 2nd to drive as im going down the road . i dont have a clue can any body tell me something. thanks

 

I'd push my car off a cliff before I convert to carb. I'm glad to say all my engines are fuel injected except for lawn equipment.

 

Could the detent cable have been misadjusted?

 

Warning! if this is not adjusted correctly you will fry your trans.

 

And your wallet too.

 

I did the carb swap with HEI . I use my 93 as a track car only. With a GM gen II manifold,holley 750 dbl pumper and a 3500 converter it picked up almost 1 second. That said , if your main use is the street keep the FI . The carbs driveabilty when cold isn't good , oh I almost forgot, I have a LARGE hole in my hood. PS If your computer was compatable you could try mine.

 

Located in boston....looking into getting a fast system now because i have a feeling my wiring harness is most likely the problem and why something shorted out. Anyone have any recomendations on a fast system? I did a quick search and it looks like system 302000 may work for what i need? I plan on calling fast tomorrow and asking them their thoughts