Vehicle & Technical > Jeep

Grand Cherokee little problems

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Bishops Finger:
An idea.. :D

sardonicus:
I have similar problems on mine when I switch from gas to petrol. It runs really lumpy and the revs are up and down and doesnt run at all well.
A temporary fix is to disconnect the battery for a few minutes,(but make sure you have the radio code !) which will reset the pcm,and should run fine again. mine does untill it has been run on gas again,so i just keep it on gas.
Ive replaced the O2 sensors but didnt make any difference, so I think its probably the crank position sensor,as that was the consensus when discussed on here some time ago.
Its a bit tricky to get to but is a fairly simple job to do,its down the back of the engine by the bulkhead near the bellhousing somewhere i think.
Good luck and keep us posted if this cures it.

sooki_blu:
Another quick thought - Is the engine the same as the 4.0 in the Cherokee? Seems easier to find parts suppliers for the cherokee online than the grand cherokee. (Mines a P 96)

One last thing - I dont have the code for the stereo, but I do have a Pioneer unit with satnav that Im thinking of dropping in anyway - do I need any specific cables to do it -dont suppose the GC has an ISO on it as standard....

dxmedia:
It's the same lump,

Yes you need a (very bleeding expensive) adaptor due to the amp which sits under the rear seat. £50 odd for the adaptor. The £5 ones from Halfords don't work if you want all functions.

sooki_blu:
What functions would I lose?  :?

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