Nick England

So, I've got this starting issue with my 1997 XJ.

I turn the ignition key to get a whining noise coming from the fuel pump, and the orange Check Engine light will not come on.. The engine will turn over at this point, but won't start.

Until the Check Engine light comes on and the whining stops, the engine will not start.

The longest wait time I've had for the light to come on has been 20 minutes. This can be reduced drastically by putting the key in and out of the ignition until the light comes on, and then it'll start.

The problem is worse when the engine is cold, as a warm engine doesn't seem to be affected, and bump starting is not a problem.

We've replaced the fuel pump and a couple of other parts in the fuel delivery system (can't remember what off the top of my head) but still the same issue.

My mechanic thinks it could be the ECU which needs replacing, but I haven't bought one yet as I can't find a source that is selling one for a good price. The dealer here want around 650 quid, which is about the value of the car, so screw that.

I did try a couple of places in Miami for rebuilt ECU's, but their customer service was a joke so I wasted a month back and forth on e-mail. Next stop scrapyard for an ECU.

Any ideas what else we should look at to fix this problem?

Cheers,

Nick

Radi

I'd consider replacing the ignition switch. At least check the connector for signs of overheating. It's a fairly common failure.

Nick England

But warm starts are not a problem, so surely if it was the ignition it would happen then too?

Turbo X_J

Check the ignition switch & connector. You have had to wait 20 minutes for this thing to start, seriously? I hope you don't work for the fire department, lol.

Nick England

Yeah.. that was a bit of a wait..

Good job I wasnt in a hurry that day. .

Turbo X_J

Resistance may be less as the temperature increases. When you turn the key to run with out starting on a warm engine the CEL always illuminates immediately?

Nick England

90 percent of thetime, yes.

Radi

Got a hair dryer? If you know the problem disappears once things warm up, you can use it to heat the ignition switch, PCM, etc until you find the culprit. But take a look at the connector first. Often you'll find it discolored from overheating.