Continued crank no start
Thread Starter
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Senior Member
Joined: Jan 2024
Posts: 178
Likes: 4
From: maine
Im hesitant to mess with it . Being one handed its difficult to access much less put back together. And as i sais it was working fine in that spliced configuration origanally. Im going to focus on seeing if my multimeter can get a response from the disconnected cps while turning over the engine. Then to see if i have a solid 12 v at the #7 fuse while turning over the engine. Ill report back today hopefully
Junior Member
Joined: Dec 2021
Posts: 11
Likes: 3
Have you checked the ignition amplifier?
I ve had a crank no start issue for a few months. 1995 xjs 4.0 lhd
what ive tried so far
1. new cps
2. new plugs
3. new battery as mine would go flat after a few days
4. sent out ecu and got confirmation its communicating
5. yesterday day i pulled coil and plug from cylinder 1 and 6 separately. Positioned plug and coil upside down n top of engine so i could see a spark from the plug as i cranked the engine. I saw nothing . So assume no spark
6. checked fuses and reseated ecu and ecm relays
my observations
1. tach jumps when cranking
2. I can hear fuel pump priming. I have a full tank of gas
3. given the no spark i have not check the fuel pressure at the fuel rail. Wonder if i should anyway
My suspicions
1 my security system has always been suspect. The car only came with one key no fob but locks both doors and trunk from drivers side lock. The red led by cig lighter sometimes illuminates . The key will chirp sometimes.. my convt top has never worked by the switch. I put it down manually . Quarter windows dont work. Ive notice in the wiring diagram it is somehow tied the the security system.
can i remove the security module from the trunk area to take that system and any starting issues it may cause out of the equation
Thanks,Jeff
what ive tried so far
1. new cps
2. new plugs
3. new battery as mine would go flat after a few days
4. sent out ecu and got confirmation its communicating
5. yesterday day i pulled coil and plug from cylinder 1 and 6 separately. Positioned plug and coil upside down n top of engine so i could see a spark from the plug as i cranked the engine. I saw nothing . So assume no spark
6. checked fuses and reseated ecu and ecm relays
my observations
1. tach jumps when cranking
2. I can hear fuel pump priming. I have a full tank of gas
3. given the no spark i have not check the fuel pressure at the fuel rail. Wonder if i should anyway
My suspicions
1 my security system has always been suspect. The car only came with one key no fob but locks both doors and trunk from drivers side lock. The red led by cig lighter sometimes illuminates . The key will chirp sometimes.. my convt top has never worked by the switch. I put it down manually . Quarter windows dont work. Ive notice in the wiring diagram it is somehow tied the the security system.
can i remove the security module from the trunk area to take that system and any starting issues it may cause out of the equation
Thanks,Jeff
Thread Starter
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Senior Member
Joined: Jan 2024
Posts: 178
Likes: 4
From: maine
Car is still at the Jaguar indie mechanic . Been there all winter I don’t think the got to it so I’m hoping after my last phone call they’ll get on it. Now my 96 x300 is experiencing the same issue. This is rediculous
Veteran Member
Joined: Apr 2014
Posts: 4,590
Likes: 3,535
From: Kent, UK
Sorry to hear of your new problem, Jeff!
It's the same diagnostic issue - you either haven't got fuel coming out of the injectors, or you haven't got a spark at the electrodes. (Or stale fuel!)
Good luck
Paul
It's the same diagnostic issue - you either haven't got fuel coming out of the injectors, or you haven't got a spark at the electrodes. (Or stale fuel!)
Good luck
Paul