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89 xj wonít rev over 1000 rpm

Old 02-25-2019, 06:06 PM
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Model: Cherokee (XJ)
Default 89 xj wonít rev over 1000 rpm

Did a tranny swap last week both aw4 transmissions so it was a direct fit back in everything hooked up fluid levels are good but when I went to drive it it would idle fine how it did before around 6-700 but when I try to accelerate nomatter what gear Iím in it stops at 1000 rpm stutters and backfires like crazy giving me no power. Iíve checked the fuses , replaced the TPS and MAP sensors and still same issue I have fuel pressure not exactly sure what pressure since I donít have a guage but it definitely sprays if I push the valve. Does anyone have any ideas ? Iím at a loss.
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Old 02-27-2019, 06:32 AM
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Location: Prescott, Az
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Year: 1990
Model: Comanche
Engine: 4.0
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You need to KNOW the fuel pressure.
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