Holley 1100 Sniper for iron duke (Page 2/4)
da.slyboy SEP 09, 01:31 AM

quote
Originally posted by snyderman:






Not to hijack, but would be interested in knowing the kind of wheels you have on your car.
FieroWannaBe SEP 09, 09:55 AM
If you currently have the factory Distributer with a carburetor (holley 3739) how are you currently handling spark advance? The Factory Dist. is advanced via the ICM with the ECU, an HEI distributer would normally use a vacuum advance (something from a carb'd Duke: 1979-1981.
RWDPLZ SEP 09, 11:34 AM
Holley 3739 is the family name for the Holley 300 series replacement TBI's, like the Fiero's 500-1
snyderman SEP 09, 11:52 AM
pmbrunelle- Thx for your help, but your 3 recommendations are all in the same price range (or more) and are not self tuning as the sniper is. I think I'll stick to my plan.

da.slyboy - they are from a 2002 Jetta with 225x45x17's. Direct fit. I think they are Monte Carlo.

fierowannabe - Sorry if I didn't explain things correctly but I'm running a 3739 TBI on a matching Holley intake so there was no distributor to change and I'm still running stock.

RWDPLZ - Yes that's exactly it.

[This message has been edited by snyderman (edited 09-09-2020).]

FieroWannaBe SEP 09, 12:45 PM

quote
Originally posted by snyderman:

pmbrunelle- Thx for your help, but your 3 recommendations are all in the same price range (or more) and are not self tuning as the sniper is. I think I'll stick to my plan.

da.slyboy - they are from a 2002 Jetta with 225x45x17's. Direct fit. I think they are Monte Carlo.

fierowannabe - Sorry if I didn't explain things correctly but I'm running a 3739 TBI on a matching Holley intake so there was no distributor to change and I'm still running stock.

RWDPLZ - Yes that's exactly it.




My mistake, i thought you had been running a 2 barrel on the stock duke. It all makes more sense now.
edfiero SEP 10, 01:22 PM
What exactly is the idle problem you are having?
Assume you've already changed out the IAC and TPS????
If the problem is caused by something like a vacuum leak, then this won't fix the problem.
Also, Self Tuning is not always all its cracked up to be. I think Fierosound first tried a self-tuning setup on his SD4, only to find it didn't work even after hours with their tech support.
snyderman SEP 10, 02:11 PM
The issue that I've had for the last 12 years I've owned it is high, uneven idle, and always running rich. I've changed everything except the wiring. This includes the ecm and prom at least twice. I rebuilt the head, added a new intake and Holley TBI and no change so I know it's not a vacuum leak unless that can come from the bottom of the engine which I have never touched. I even took it to a GM dealer that used to sell Fieros and they also were stumped. I know when to cut my losses so I'm going to take a new direction and will try the Sniper. I'll let you know how I make out. Thanks for all your interest.
Chris Eddy SEP 11, 10:05 AM
My hunch is that you will solve nothing.. sorry to be blunt.
Can't you monitor your ALDL and see what is happening? Look at short/long term trim?
At least verify leak/no leak?
Play with propane and tell us the results?
The stock TBI if working correctly would not account for your idle behaviors.
pmbrunelle SEP 11, 01:04 PM
Regarding the self-tuning aspect, I wouldn't get too worked up over that. That's just for fuel trims. "Self-tuning" is marketing wank IMO.

I looked through the pdf instruction manual available online, and there are plenty of settings to be adjusted; settings which do not self-tune.

I'd say that I went through 50 hours of my time and 500 litres of gasoline to get a good tune on my Fiero's programmable computer (MS3) this summer. I did this over approximately three months.

Experience of the tuner and complexity of the car/engine will affect the time needed to get a good tune.

I suspect that you have a good amount of work ahead of you!

[This message has been edited by pmbrunelle (edited 09-11-2020).]

snyderman SEP 11, 06:08 PM
Chris

My ALDL is pulling the code 51 which is a bad prom. I changed it out using 2 others so it may have been my ecm so I changed that out too. So even if it was working what code would help me find any leak as I think that's what your suggesting...no?