Sorry it’s the won’t start issues
Thread Starter
Newbie
Joined: Sep 2018
Posts: 4
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From: Telford
Model: Grand Cherokee (ZJ)
Engine: 4.0
Sorry it’s the won’t start issues
Hi all I’m Brian from England I too have the won’t start issue ,
ok issues :
wont fire but will turn over
then instrument panel not working apart from abs light
done:
replaced cam sensor
crank sensor
coil
No power to the coil
ive bypassed the asd and fuel relay by connecting earth direct to battery still nothing then tuck a direct feed from the coil to the battery still won’t start
It’s very frustrating can you help it’s a 4.0 1998 auto 4x4 ZJ
ok issues :
wont fire but will turn over
then instrument panel not working apart from abs light
done:
replaced cam sensor
crank sensor
coil
No power to the coil
ive bypassed the asd and fuel relay by connecting earth direct to battery still nothing then tuck a direct feed from the coil to the battery still won’t start
It’s very frustrating can you help it’s a 4.0 1998 auto 4x4 ZJ
CF Veteran
Joined: Nov 2015
Posts: 2,863
Likes: 201
From: syracuse ny
Year: 1997 230,000 miles
Model: Grand Cherokee (ZJ)
Engine: 4.0, new lifters valve job with new springs and exhaust valves, preload set with shims
Have you connected a code scan tool? Does it read anything or maybe not work at all?
CF Veteran
Joined: Nov 2015
Posts: 2,863
Likes: 201
From: syracuse ny
Year: 1997 230,000 miles
Model: Grand Cherokee (ZJ)
Engine: 4.0, new lifters valve job with new springs and exhaust valves, preload set with shims
Sometimes if the pcm has gone the code reader won't connect properly, so that would be a useful thing.
No power to the coil..that is interesting. Have you checked the socket of the ASD relay to see if it is energizing?
No power to the coil..that is interesting. Have you checked the socket of the ASD relay to see if it is energizing?
Thread Starter
Newbie
Joined: Sep 2018
Posts: 4
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From: Telford
Model: Grand Cherokee (ZJ)
Engine: 4.0
I’ve connected the live feel from the coil direct to the battery still no spark I’ve tested the new cam and crank sensors they are fine and the smell of fuel too so the injectors must be working although one strange thing happened when I disconnect the earth wires to the fuel and asd relays and connected them to the battery no spark but when i spliced them to the earth side of the coil the dash came back on wth the key out ?
CF Veteran
Joined: Nov 2015
Posts: 2,863
Likes: 201
From: syracuse ny
Year: 1997 230,000 miles
Model: Grand Cherokee (ZJ)
Engine: 4.0, new lifters valve job with new springs and exhaust valves, preload set with shims
I recommend downloading the factory service manual for about $7. there is a whole section on no start troubleshooting and how to proceed. You are just shooting in the dark there and you're going to end up ruining something. sorry cant be more help. Welcome to the forum.
Thread Starter
Newbie
Joined: Sep 2018
Posts: 4
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From: Telford
Model: Grand Cherokee (ZJ)
Engine: 4.0
Ok thanks anyway if I come across the issue I will let you know I’m running out of patience it’s been off the road for the past 8 months so short of paying out £800 for a new Ecu I will probably end up scraping it
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