RIKFISHERMAN

96 Grand Cherokee 5.2 . After an abrupt stop the engine stalled and was hard to get started. The next day it started but idled rough. Installed new plugs seemed fine. Next day turned over no start. New crank sensor no start. Checked fuel filter, it was very dirty replaced it and got it to run. Runs with miss at idle and when accelerated(punched down) at 40mph misses and vibrates badly. Won't start when cold. new rotor, dist cap,and wires still the same. Checked fuel pressure 47psi and the fuel filter ok. Checked spark (with timing light) at coil has intermittent spark. The spark looks good at all plugs but one #8 has very intermittent spark. please help

okcjeeper

Moved to GC tech area. You should get more response here.

jyaughn

what plugs did you put in it?

RIKFISHERMAN

BOSCH PLATINUM'S. Forgot to mention that there are no check engine codes.

jyaughn

try going with the champions. thats what came in them. sometimes different plugs can cause it to act weird

yankeebikachic

I had to upgrade my plugs as well. what about o2 sensors?

RIKFISHERMAN

No start cold today. Had weak spark at coil wire when cold. Tried new coil started and runs good, no miss at idle or on acceleration. Will post in morning when try to start cold. I might try the champions, read something about them before.

jyaughn

sweet keep us posted

RIKFISHERMAN

Started right up this morning. Took it on a drive while cold runs good. Thanks for support. This is a great forum glad I joined.

jyaughn

im glad to hear that.

SpooledupRacing

humm I may get a new coil for my RIG.. seems mine cranks hard in the cold deff...

I would not use BOSCH anything...

On the other hand ME PERSONALLY.. I hate champion..

I would use NGK plugs (no need for platinum)

jyaughn

champion is what came in them from the factory

SpooledupRacing

yes but as with most things, products have improved in the last 10-15 years so there are other things out there that may be better then OEM

jyaughn

yeah but the plug has also changed