1992 Ford Escort quits responding to throttle

FORDTRUCKTATER

MEMBER
1992 FORD ESCORT
4 CYL
FWD
MANUAL
138,456 MILES

Cranks fine and revs fine when cold, but when it warms up motor bogs down and eventually idles no matter how much gas you give it. Fuel pressure good, compression good, timing good, spark plugs, wires and coil pack good. Replaced idle air bypass, throttle position sensor, upstream oxygen sensor ECM. Got any advice? Thanks

5 Replies

BMRFIXIT

MECHANIC
19,053 POSTS

Check exhaust back pressure
check for codes
map sensor

Was this

answer

helpful?

Yes

No

Monday, July 28th, 2008 AT 7:04 PM

FORDTRUCKTATER

MEMBER
12 POSTS

Loosened exhaust from manifold to check for a clogged cat, Cant find the MAP sensor looked on ALLDATA for a location, and it has no codes. Thanks though.

SPONSORED LINKS

Was this

answer

helpful?

Yes

No

Tuesday, July 29th, 2008 AT 5:56 PM

BMRFIXIT

MECHANIC
19,053 POSTS

Check coolant sensor and tps volts

good luck

Was this

answer

helpful?

Yes

No

Tuesday, July 29th, 2008 AT 6:07 PM

FORDTRUCKTATER

MEMBER
12 POSTS

Thanx the check coolant light is on and I found out he didnt change the TP sensor. Im going to check the potentiometer on the sensor if its good, im going to take it to my work and work on it. I work at Clarks tire and auto

Was this

answer

helpful?

Yes

No

Wednesday, July 30th, 2008 AT 5:06 PM

FORDTRUCKTATER

MEMBER
12 POSTS

Went to take the timing cover off and the crank pulley was bent. And it sheared the keyway. So the CP sensor couldnt get a reading. And all of the spark plugs had a 70/1000 gap or higher and they were gas fouled. Problem solved. Thanks for all the help.