Weird problem need some help guys
11-25-2010, 10:51 PM
#1
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Year: 1993 XJ Sport
Model: Cherokee
Engine: 4.0 so far upgrading to hesco soon
Weird problem need some help guys
I have a 90 xj with the 4.0 that will not rev over 2 grand its a manual and has stumped everyone I know including the diagnostics machine any clue as to whats going on?
11-26-2010, 05:10 AM
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Year: 1987
Model: Cherokee
Engine: 4.0
had the same issue on my room mate's '87 renix 4.0.
replaced EVERY sensor on the truck, engine wiring, all computers, he has no cat and no muffler (straight piped), and no restrictions on intake. replaced fuel pump, fuel pressure regulator, and injectors, too.
last thing is timing. screw it. oh, and distributor is indexed to TDC#1 it runs, that's all he needs...
replaced EVERY sensor on the truck, engine wiring, all computers, he has no cat and no muffler (straight piped), and no restrictions on intake. replaced fuel pump, fuel pressure regulator, and injectors, too.
last thing is timing. screw it. oh, and distributor is indexed to TDC#1 it runs, that's all he needs...
11-26-2010, 09:23 AM
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Year: 1999
Model: Cherokee
Engine: 4.0
Some basic vacuum testing is very efficient way of determining if
you have a clogged catalytic converter.
Have you performed fuel pressure testing (pressure and volume) yet? With a gauge is the only way.
Probably should be ruled in or out.
you have a clogged catalytic converter.
Have you performed fuel pressure testing (pressure and volume) yet? With a gauge is the only way.
Probably should be ruled in or out.
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