Delayed start problem
10-10-2007, 06:17 PM
#101
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Re: Delayed start problem
On Sep 26, 10:21 am, nrs <neale...@yahoo.com> wrote:
> My '95 2.5 AX5 YJ has a strange problem, usually in the morning when
> it is cool. When the key is turned to run, the check engine light
> does not turn on right away. There is a delay of a few seconds and
> then the relays in the power distribution box under the hood start to
> click rapidly. Once this happens, the fuel pump runs for a short
> while and the jeep can be started. It seems like the computer is not
> aware right away that the ignition has been turned to run. If I
> immediately turn the key to run again (after first returning it to
> lock) the check engine and fuel pump turn on normally. After letting
> the jeep sit turned off for about 5-10 minutes, the problem will
> return. Later in the day when it is hot, this almost never happens but
> it does once in a long while, usually after sitting turned off for at
> least a few hours. What could be causing this? What could cause it to
> work fine on the second try?
>
> Thanks
The dealership confirmed it is the PCM. I'll be looking for a cheap
used PCM now. Thanks for all your help.
> My '95 2.5 AX5 YJ has a strange problem, usually in the morning when
> it is cool. When the key is turned to run, the check engine light
> does not turn on right away. There is a delay of a few seconds and
> then the relays in the power distribution box under the hood start to
> click rapidly. Once this happens, the fuel pump runs for a short
> while and the jeep can be started. It seems like the computer is not
> aware right away that the ignition has been turned to run. If I
> immediately turn the key to run again (after first returning it to
> lock) the check engine and fuel pump turn on normally. After letting
> the jeep sit turned off for about 5-10 minutes, the problem will
> return. Later in the day when it is hot, this almost never happens but
> it does once in a long while, usually after sitting turned off for at
> least a few hours. What could be causing this? What could cause it to
> work fine on the second try?
>
> Thanks
The dealership confirmed it is the PCM. I'll be looking for a cheap
used PCM now. Thanks for all your help.
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