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strange issues...
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i can get the car to start fine when cold, but when i keep it running after 5 mins the idle changes to a shitty almost gonna stall, but when u give it gas it stalls.i changed distrubtors so it cant be that. i did run outta gas recently so i am gonna change the fuel filter....other than that idk. any ideas?

fuel pressure is at 40-43 psi even when it runs shitty

the car is a 1990 mustang 5.0 n/a

-- Edited by flamingpony on Saturday 4th of September 2010 10:00:21 PM

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RE: strage issues...
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Oh that was your car on the flat bed last sunday.

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Would it be the mass air flow sensor?

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yes that was my car haha fml!

i unpluged it and nothing changed, i was told that mans maf is ok.idk

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Check coolant temp sensor,if thats okay then check O2s

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ZOHAN

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the coolant sensor was bad in my 95 gmc 454bbc and it ran like ass. that was gana be my guess.

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o2 sensors

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91 mustangs hatch 6.0 LSX , (STOCK SHORTBLOCK )
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LSX- STANG wrote:

o2 sensors




they are brand new that would suck, i changed fuel filter and same shit...just wierd how it runs and drives fine for 5-7 mins then runs like ass

-- Edited by flamingpony on Saturday 4th of September 2010 09:10:03 PM

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Its running off a preset program on the computer until it gets up to temperature then it relies on all the sensors to do the work

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Mustang Guru

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Check the voltage on your TPS. If you are not sure how to do that let me know. It is very easy and I will tell you how.

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1993 LX
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Mustang Guru

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flamingpony wrote:

LSX- STANG wrote:

o2 sensors




they are brand new that would suck, i changed fuel filter and same shit...just wierd how it runs and drives fine for 5-7 mins then runs like ass

-- Edited by flamingpony on Saturday 4th of September 2010 09:10:03 PM




What brand did you buy? Anything other "Bosch" in a Ford will cause it to run like shit.

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1986 LX
1984 LX
1993 LX
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like scott says it is ok then goes into closed loop where all the sensors are working . where are you located i have a scanner i might be able to hook it up and scan through the paremetors and see if anybody lnows what is off for readings f no codes come up not sure on obd1 but i know obd II throws a code for o2 sensors

-- Edited by monte on Saturday 4th of September 2010 09:36:58 PM

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im in cumberland ri

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RE: strange issues...
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if i can get a ride on like a sat afternoon or sunday i could get there


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monte wrote:

if i can get a ride on like a sat afternoon or sunday i could get there




let me know the sooner the better.

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you either need a good digital multi-meter or a scan tool and start looking around. i was borrowing an isuzu trooper about 10 years ago that had a 2.8 gm engine in it. i had to replace the o2 sensor and just got one from pep boys. about a month later the c.e.l. came on and it had an o2 code in it. the voltage from the sensor was stuck around .300v which indicated lean, so i sprayed some carb cleaner in the throttle to richen it up and the sensor didn't move. so i bought a gm sensor and problem solved. as someone else stated what sensores did you use?

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i think bosch

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Hook a scanner to it and look at the data flow...

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