Please! Help! Mustang wont run! Im going nutts

[92droptopgt]

Ooooook! I need gelp my daily driver 92 mustang gt 5.0! The car will start up and run for a sec and have you think its good but once you put it in gear and go im getting hesitation! Sputtering! Back firing poping the hole nine yards! Nooo power what so ever!

I have checked the PLUGS! They stil look brand new a little used but no more then 7,000 miles! Wires also are the same accell plugs wires! I have stock distributer and rotor and cap! BUT!! My ignition coil is a spitfire high power oil filled container all this is the same age abd was installed at the same time. The only thing out of allllll that would bad I think is the ignition coil? I dont trust it! And it was installed about 6 months ago!

Im at a loss I unplug the maf sensor and it ran real good I mean real good and in mid flight it was shitin like not geting gas! So I pluged it back up and went with it coils it be a vacume maf timing? I dont understand why or whats going on!

Please help im at loss! Big loss! Thanks before hand!

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[92BIGREDBEAST]

There could be numerous things causing this issue. To be honest, i have nevere heard of a car that would run with the MAF unit unplugged. That would be a first for me. I would think this would be where i would start my diagnosis at. You can get a pub hair on the sensor and they will act up! LOL But seriously, your car ran when you unplugged the MAF unit? Maybe you unhooked the AIC and not the MAF.

 

[92droptopgt]

No no no the maf I unplugged it and yea! You no the meter on the intake! Square black box with a 4 pin connector come on now do some reseaech you can eun with out it how do u think I got the idea? Anyways any other people that may wana help! Please help? What about egr tps? Iac?

Iv been told my maf sensor is bad like I said I unplugged it and it ran good really good I drove down the street and the car started actin up so I got scared and pluged it back in a limpd home! Is there anyone out there that won't second guess my question! I built this car by scratch! And sometimes the electronics drive mr crazy from time to time anyone with knowledge please?

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[88montecarlo]

You might have a bad head

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[Mustang-Junky]

Did you check for codes?

Jess

 

[zoomie]

hmmmm sounds like a vac line could be the issue, check all your vac lines, a bad MAF or MAP sensor would do this too.if its running with it unplugged then i would suspect that nothing in the ignition system is the cause. if it where the ignition chances are it wouldnt even turn over, but it does sound like a vacumn leak though, also when did this start?

 

[1990_LX]

There could be numerous things causing this issue. To be honest, i have nevere heard of a car that would run with the MAF unit unplugged. That would be a first for me. I would think this would be where i would start my diagnosis at. You can get a pub hair on the sensor and they will act up! LOL But seriously, your car ran when you unplugged the MAF unit? Maybe you unhooked the AIC and not the MAF.

Yes they run...just really really rich. must be a default mode in the compooper that once it stops getting info from the AMF it goes into a rich default mode.

 

[fearkills]

you can get a can of MAF cleaner and try and see if it helps and also it could me a vacumn leak like zoomie said

 

[92droptopgt]

This was doing it every now and then the "lost power boggn down" for a sec and then would be a few days until happen again and trust me I cleaned the maf ans deff no vacumm leaks! Mayb? Vacumms switched up in wrong place? Like smog pump vac going to wrong place? Idk lost! Im still kinda stuck on maf? Im going to get one and install it im just going to grab one from a 3.8 taures 95 96 I beleave and see cross my fingers!

Yal think map? Hmmmm should I grab one just in case?

Also if your standing face to face with car theres a little round cylinder I think its the iac? Not sure! 2 wire hook up its on the left side of the planem facing the front of car when I unplug it on my other 5.0 it shuts off on this mustang it dosent do anything!? No response at all I will be changing that tommorrow deffinitly! Thanks for ur help keep it coming please!

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[92droptopgt]

One thing I hasn't done is check codes but I have no computer and car runs to crapy jumping every wherw lmao people looking at me like wtf? I told one guy at the light fing maf he said I bet its fast tho as I ppute shaked and rattled away any ways every thing on the intake with a wire has an important role and if you can take the wire off and feel no difference theres a problem!

Maf it ran quick and rich for about 20 min once it warmed up it would feel like it wa chokin in mid flight and id floor it and would get gas going again must be the comp fighting the engine! Well its doing better then the maf I guess!

And I started the car with the tps sensor unplugged justa c trying everything I could! While the engine was running I pluged it snd it had a quick serg for a split second mayb just tps showin,up in system!



Im stuck between maf iac if thats what that cylinder is I was discribing earlier in last post or map sensor witch I did just replace that line now that I think about it maybe its loose it would cause all that tho? Well would be a big vac leak givin coming str8 from intake! And a map sensor not going to comp! If so then why would maf run unpluged felt like no restriction no hesitation compared to what it was! Still ran shitty wen warm tho! "unpluged" that is!

Well guess we will find out

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[zoomie]

you would be surprised at where a vacumn leak could be, yes the intake would cuse a vac leak if the gaskets are too old, also there are vac line that run in the back and underneath it as well i would double check to make sure, should have seen what happend when i didnt have the MAP sensor vac line on(forgot to hook it up when i did a gasket change) it idled like a b cam sounded cool as snot, but woulndt really do anything. on my car the MAP is located on the firewall behind the intake. DO check the MAP sensor though as they do go bad once in a while.

couple other things i know that if its running and then bogging down and running again an ac clutch when it cycles would do that too .clutch kicks in and then booog almost stall, then ruuun clutch cylce and booog etc etc.
IAC: usually if an IAC is going it will idle up and down especially at stop lights

 

[manhattanmustang131]

Check for arcing; I had a similar issue a few weeks ago. Go outside when its pitch black out and start the car and look for little arcs coming off the plug wires.

I was in a similar situation; everything under my hood that could cause the problem was either new, or just a few thousand miles old. It sucks to have to play detective, but I guess it comes with the territory.

 

[92droptopgt]

Welll......its fixed it was the maf! I replaced that and the clutch fan wit an electric fan less drag on the motor! WELL anyways thanx for all the help!

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