I cannot stab the throttle. If I do the car dies. If I'm cruisen' say 30m or 40 mph down the road and try to stab the throttle it will die. Vice versa.......if I take my foot of the throttle while driving 10 to 50 mph then the car will die. I have changed all the sensors, coilpack (at least half a dozen times), throttle body,iacs', injectors ( actually it has done this with 42#,55#,72#,83# injectors) I have had the fuel pressure everywhere and it does not make a difference. I have also switched out the ecm, plug wires plugs and plug gaps. Nothing makes a difference. Any suggestions?
...gotta problem..........
- Thread starter Dwayne
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Oh yeah...........
I have changed the coilpack and module at least 6 times with known good coilpacks, and yes the fuel pressure stays steady. I have been leaning towards the wiring harness as the problem for about a month now. Anybody got any suggestions on a way to check the harness before I pull it........all suggestions welcome
I have changed the coilpack and module at least 6 times with known good coilpacks, and yes the fuel pressure stays steady. I have been leaning towards the wiring harness as the problem for about a month now. Anybody got any suggestions on a way to check the harness before I pull it........all suggestions welcome
striker_29
Senior Member
- Joined
- May 31, 2001
- Messages
- 2,002
I may be way off on this, but I'm with killerb. If you have changed all those things, maybe something going on with the converter or chip/converter combo.
What do you have for a combo? Maybe we could narrow down the guess work a little..........
I'm assuming since you swapped out different injectors, you changed chips at the same time.
I can't see how the torque converter can be involved, maybe someone can enlighten me?
You have probably tried this, but what about the TPS sensor?
Maybe the voltage drops to zero at times?
I guess Directscan would tell the tale.
I'm assuming since you swapped out different injectors, you changed chips at the same time.
I can't see how the torque converter can be involved, maybe someone can enlighten me?
You have probably tried this, but what about the TPS sensor?
Maybe the voltage drops to zero at times?
I guess Directscan would tell the tale.
Reason why the TC was suspect was due to the problem with the car dying. A smaller dia conv equals less rotating weight on the crankshaft, and sometimes the IAC motor can't react fast enough to keep the engine from stalling under decel. The TC is not his problem. Various chips have been tried. Dwayne, put a FAST system with the race harness on that thing and never look back. We can find you a decent laptop, get you a startup program, and get you running. If you have to buy a harness anyways....
BigDaddy@work
New Member
- Joined
- Oct 12, 2002
- Messages
- 5
It acts like the IAC is way too slow........it can't react quick enough to respond to the load or lack of.....all the chips I have used are Red Armstrong's. I gave Red all the info on the set-up, including the convertor..My combo is as follows
stock block
stock bore and pistons
70 turbo
83# injectors
3500 precision non-lockup conv
stock heads and intake ported to the max
62mm throttle body
3.5" downpipe
racegate on crossover
218/224 billet roller
1.65 T&D roller rockers
A good friend of mine said that Red programs his chips to give extra fuel because most people use the stock size fuel lines. I'm using larger lines...could this be a problem
stock block
stock bore and pistons
70 turbo
83# injectors
3500 precision non-lockup conv
stock heads and intake ported to the max
62mm throttle body
3.5" downpipe
racegate on crossover
218/224 billet roller
1.65 T&D roller rockers
A good friend of mine said that Red programs his chips to give extra fuel because most people use the stock size fuel lines. I'm using larger lines...could this be a problem
John Larkin
Sublime Master of Turbology
- Joined
- May 25, 2001
- Messages
- 5,013
Check that TPS with DS hooked up. It may have a dead spot. You should find it with key on, engine off. Might have to use a voltmeter with an analog/needle readout to watch it. Smooth incremental rise or fall should occur regardless of how fast you snap the throttle.
I thought of that too John..........I have been thru 4 TPS sensors, the last one being a brand new one from GM. If I do find a dead spot, I think it would be in the wiring and not the sensor. I have a good running 87 that I have been swapping parts with as well as Dad's car so I just about 99 % sure that the parts are allright.
Hey Scott.........I know where you are coming from, but the only problem I have is that if I spend the 2500$ and hook the FAST system up and still have the same problem, then I'll be one pissed-off-broke-as-a-joke-mfr. I HAVE to find out what is causing the problem before I move on.
Maybe when everybody gets off work this evening, somebody will have run into this before..........keep the suggestions coming fellas
Hey Scott.........I know where you are coming from, but the only problem I have is that if I spend the 2500$ and hook the FAST system up and still have the same problem, then I'll be one pissed-off-broke-as-a-joke-mfr. I HAVE to find out what is causing the problem before I move on.
Maybe when everybody gets off work this evening, somebody will have run into this before..........keep the suggestions coming fellas
NA Regal....
Something has to be wrong with that harness. I know your Dad and I swapped parts on it all day long when I was up there last year. Is your battery voltage good while running? You don't have another built engine around do you? Take a Saturday and swap engines and see what happens. It's been acting up ever since that engine was put in it. But you did alot of work to that car at the same time too. You need to make sure and tell everyone that this was a NA regal if that matters.
Something has to be wrong with that harness. I know your Dad and I swapped parts on it all day long when I was up there last year. Is your battery voltage good while running? You don't have another built engine around do you? Take a Saturday and swap engines and see what happens. It's been acting up ever since that engine was put in it. But you did alot of work to that car at the same time too. You need to make sure and tell everyone that this was a NA regal if that matters.
Damn!! Didn't know you'd been through three. I thought only two...Wish I had an extra harness I could send you to try. Have you swapped inj harness yet? Don't think we tried that when I was up there...Does the car still pop and spit at WOT? Sounds like you can't even dip into the throttle now. I don't remember it doing that before??? Can the fact that it started life as a NA regal have anything to do with your problem? I've seen several transplant cars run fine though....Elect probs are the worst
You could try putting the car in field service mode and see if you hear the IAC running out....May not be getting voltage to it. Just throwing out ideas here. Try opening up your Service manual wiring schematic and start probing each weatherpack connector and make sure you're getting correct voltage to each sensor. You may have already done that I don't know...
make sure the positive battery cable to the battery is not hitting your header on the passenger side going down to the starter, if it only happens under harder throttle. when the motor torques up sometimes it hits and melts the battery cable and shorts it out.
Otto
Otto
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