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Old September 20th, 2012, 10:55 AM   #1
yyj87
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Default 4.0 stalls

4.0 - ax15-231j 1991 wrangler

When using the engine as a brake for more than 2-3 seconds or reving the engine past 2500 rpm and letting off the throtle it dies. This is a slow death, 3-6 seconds of sputtering at 300 rpm then stall out. Starts right up and idles/runs fine.

Iac,tps,o2, crank sensor and map are new in the last 6 months for other reasons.

Fuel pressure steady at 45 psi.

No codes thrown aside from ac

Looking for sugestions.
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Old September 20th, 2012, 11:29 AM   #2
jerm97xj
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I dont know if it works on jeeps but GMT 800 trucks need the throttle body cleaned for a stalling issue. Its worth a shot.
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Old September 20th, 2012, 03:31 PM   #3
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Quote:
Originally Posted by jerm97xj View Post
I dont know if it works on jeeps but GMT 800 trucks need the throttle body cleaned for a stalling issue. Its worth a shot.
When i did the iac i cleaned it with a dremel a whire wheel/cone. This issue was present before tb clean and didnt change.

Thankyou but i dont think thats it, i will inspect the tb again for shits&gigles tonight.
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