89' 4.0 runs rough when cold

[Big Rich]

This is probably simple, but....

Hard to start, runs really bad (like it's running on 3 cyl) until it warms up.

I was thinking ISA motor on the throttle body ?

Anyone have simuliar problems?

The wife is realyy starting to annoy me about this

The correct lead to a fix will recieve 2 free admissions into any 1 W.E.ROCK event we do this year.

Need Help, so thanks in advance

Big Rich
W.E.ROCK
530-417-5333
www.we-rock.cc

 

[tompatjr]

Have you checked the plugs?

 

[Big Rich]

Have you checked the plugs?

No, because it runs great when it warms to about 170-180*

After doing seach it be one of the sensors on the Thottle body or the temp switch, any good guess's

Rich

 

[tompatjr]

Fuel, compression, spark...I'd check the plugs while it's been running cold and see what they tell you.

Maybe dirty injectors? Gas might not atomize well when cold.

 

[cherokee89]

Sound like this?

http://www.naxja.org/forum/showthread.php?t=73309&highlight=hard+hesitation

I am 99% sure this is from a bad TPS, but I still have not had time to mess with it. None of the others with these problems have given any updates.