The car died on the highway shortly following an oil change and radiator flush. The driver said the check engine light came on and a few miles later the engine made a clunk and died. She had it towed to a nearby garage and they generously offered to rebuild the engine for about $3200.00 (about 6X the value of the car) but the mechanic wouldn’t say what was wrong.(Rip off.).
We couldn’t get it started so I picked the car up and towed it (200 mi.) On a dolly.
While cranking the engine it would initially fire a few times and then sounded like it was alternately trying to fire three times then nothing then three times and nothing…in a sort of burmp burmp burmp…whirr… and so on as long as I turned it over. Then if I tried to crank it again it wouldn’t fire initially but did the same burmp burmp burmp…whirr… burmp burmp burmp…whirr.
The DTC set 1 code: P1635 “5volt reference circuit A” I checked all the sensors I could find for the 5 volt signal but I am not sure if I got all of them. Every one I checked was good (5v.).
So far here is what I’ve checked:
Fuel pressure 40 psi.
Coil packs primary and secondary passed
Wiring harnesses looked ok and are properly seated.
I have spark so I ruled out the crank sensor.
At this point it sounds to me like it jumped time or possibly a broken timing chain
If the problem is with the timing or a broken chain wouldn’t that set some other codes?
Is there any quick way to check the timing without tearing it down?
And what systems use the 5v. Ref. A circuit?
have the same problem?
Monday, October 31st, 2011 AT 12:16 AM