engine just shoots down riding !! then turns it again! suddeltly !

[grandcas]

hi
I have a automatic 2002 PT cruiser
I have a problem, the egine just shoot down riding at the highway and then turns it up again after couple seconds ! no light signals at the panel, the odometer just goes to zero, the weel tunrs hard and breakes turns hard too.
as I said, after a couple seconds riding at the high way, two or five just the engine turns it again !!!


now when I ride in low speed, some times just the engine die, I stop, put in parking, then turn the key to the off position, then turn it on again, some times I see the effect of not turning as usual at the position should turn it on, takes a mili second to respond the swicht... some times just turn on the engine with no problem.

please help me what is the problem here..

does any one had this problem before?

thank you so much.

[CREWZIN]

I searched around and came up with a couple of suggestions.

The fault could be a clogged Catalytic Converter (if you have one in your country). You sound like your from out of the U.S.

It could also be a faulty Camshaft or Crankshaft sensor.

Lastly, it could be the SKIM (Sentry Key Immobilizer Module). If the 'chip' in the key quits sending its signature to the security module, the engine will be cut off. Try using your secondary key for a while to see if it resolves the problem.

[grandcas]

thank you I will try these options, I will post the resoults
regards

[grandcas]

here as agreed the results of the actions taken.
after several evaluations of the SKIM, the PCM found damaged.

PCM replaced with a re manufactured part by MOPAR, immediately car worked fine.

thank you for the help

[CREWZIN]

Your welcome. Enjoy the ride!

[grandcas]

now I have one new issue.
suddenly rinding in low, the RMP clock jumped and speedometer too, and then engine keeps in first, no changing to the next second or third......
I afraid the PCM got damaged again...
what do you think on this new issue....?
regards

[CREWZIN]

Did some searching and here's a suggestion. You have a fuse box in the engine compartment that looks like the picture below, only turned 180 degrees.

The "E" relay is called the ASD relay. Take out the ASD relay and replace it with the horn relay letter "A" and see if you get your gears back.



If that doesn't work, did you get an engine light when it went into first gear? If so, we'll need the code for further diagnosis.

[grandcas]

hi, so many thanks for the response, I will try first thing tomorrow morning,
regarding to your last question, no engine light when this happened.
I will let you know.
really appreciated the help here.

so many thanks for your attention.

regards

[grandcas]

hi, just did what been recommended changed the horn relay ¨A" by the ASD ¨E¨ relay, no change at all, the engine still at the first gear, no change to second, also no engine light at the dash board.

any other recommendation here?

[CREWZIN]

No, not from me, sorry. Unless someone else comes along, looks like you might have too find a dealer or mechanic with a scanner to see if they can pinpoint the exact problem.