92 mustang 5.0 5 speed stalls need some help
- Thread starter streetracinflint
- Start date
smoked72
Forum Member
Fine tuning headaches
I have had B,E and F303 and 1087 cams but its all about fine tuning. Ensure the TPS sensor is set right, clean or replace that IAC motor and make sure the MAF sensor and filter is clean (CRC sells correct cleaner for meter) and the filter is not getting alternator air wash. I would also check fuel pressure at idle and timing just to rule them out. I had a bad regulator once that was dumping fuel at an idle and the car would stall.
I have had B,E and F303 and 1087 cams but its all about fine tuning. Ensure the TPS sensor is set right, clean or replace that IAC motor and make sure the MAF sensor and filter is clean (CRC sells correct cleaner for meter) and the filter is not getting alternator air wash. I would also check fuel pressure at idle and timing just to rule them out. I had a bad regulator once that was dumping fuel at an idle and the car would stall.
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laynplztic
Club Member
Op is fine, drops some when the car does its surging , ive read alot of horror stories on this cam swap, maf is clean as is the filter. Ive checked fuel pressure its dead on, iac,tps etc are all new as of saturday and i did the "relearn" steps
This only happens at idle or coming down from high rpms to a stop light. Only after the cars warmed to op temp
This only happens at idle or coming down from high rpms to a stop light. Only after the cars warmed to op temp
OMG ITS BEAN
Forum Member
Here is the little plate ive had on my cars before. Always made it easy to adjust idle. They used to cost like 15 bucks haha.
http://www.cjponyparts.com/idle-air-control-adjuster-1986-1993/p/HW2451/
http://www.cjponyparts.com/idle-air-control-adjuster-1986-1993/p/HW2451/
smoked72
Forum Member
adjusting TPS
I typically set the tps to 1 volt. Here is a link to show you how. http://www.youtube.com/watch?v=wQXnMku7UHE
I typically set the tps to 1 volt. Here is a link to show you how. http://www.youtube.com/watch?v=wQXnMku7UHE
streetracinflint
Forum Member
thats exactly when my stalls too.... its a mother f'er I even thought about getting a stock cam and put back in there...
TooSlo86
Club Member
This particular one sounds as if the injector p/w is too much at that particular temp resulting in a rich mixture causing idle surge. Now where streetracin says that it wouldn't restart (even when flooring it) that sounds like the exact opposite, not enough injector p/w.
Which exact issue? The one where if you shut it off and it doesn't restart, or restart it and it surges and stalls or it'll just start surging coming to a stop? Streetracin', do you have stock maf and injectors?
This one could either be to do with the "calibrated" maf or in the dashpot decay. The ONLY way I was ever able to get rid of surging before my tuner was to keep playing around with how I clocked the maf, and by playing with FP. The most probable cause of surging is an over-rich mixture, and here's why it happens with your cams; the eec is staying in CL so it's shooting for a target of 14.64:1, your cams most likely have just enough overlap that the 02's are picking up a false lean, thus falsely enriching the mixture until they see the bias they expect with a stoich burn resulting in the rich idle surge.
Initially I asked about the chip because I had read it that the car was just flat dying out of no where, which can occur when the chip isn't making a good contact at the J3 port.
If any of you have an adjustable FPR I would try to pull a few lbs of pressure out of it while it is up to temp, shut it off, and see if it gets better on a warm/hot start, that would at least let you know if it's a rich surge or caused by something else. I wouldn't go driving it like that if you took alot out and don't have a wb though, you may go lean elsewhere.
90SuperchargedLx
Forum Member
Common mustang with a cam and mass air problem I had same problems with my car,it would surge idle up and down till it stalled but ran fine going down the road its gonna need a tune. Took my car to lidio problem fixed.
laynplztic
Club Member
Im lost with it, anyone have a stock cam laying around?? Or work for beer to help me get this pos square?
hangemhigh
Club Member
Common trick back in the day. We used to sell these quite often.
laynplztic
Club Member
Does that iac plate work to solve this issue?
mustang1986
New member
so if you put bigger injectors in dont you have to put a matching mass air flow?
smoked72
Forum Member
Absolutetly good advice !!!. I figured they wanted to try to mess around a bit with trouble shooting without spending $500 but in the end the tune is the fix.
laynplztic
Club Member
I figured mine out ... was real simple... i sold it lol
streetracinflint
Forum Member
lol.....nice I guess that is one way.......
MentalMisfit
Club Member
I know on my 91 vert with an e303 and cobra intake we ended up giving it a vacuum leak its the only way it would stay running. just left one of the ports open near the intake ran like a champ after that lol. If i plugged it with my finger it would stall out in seconds.
