I noticed a sensor on the driver's-side camshaft, and also a sensor behind the crankshaft sprocket.
I've been told that with these sensors, and also a knock sensor somewhere, the computer can compare all that data - along with fuel injector pulses for each cylinder - and figure out a lot.
I tore it back apart last night (took less then half an hour). I will repost today if I fix it. It appears that the right-cam is one tooth off and left cam is fine. This because the timing marks on the belt are incorrect. The cam that is one tooth off runs on cylinders #1 and #3 - the ones that now give an error code as "misfiring."
Right now - the issue seems to be mis-information. From all I can tell, the tooth count on the timing belt on the SOHC 2.5 is different from other similar engines (like 2.2s) - and the info is wrong in the factory service manual. Subsequently, new aftermarket timing belts are marked wrong.
I did a lot of searching and finally found two people who had the exact same problem. So, I took the original belt and examined with a magnifying glass. Sure enough, I found the old OEM timing marks and they do NOT match the new belt.
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Today's Featured Article - The Great Escape - by Dave Hollrah. It all began Monday with a little baling of second crop on the lake shore field, and as I drove out past my sister and her hubby's place, this small calling sound could be heard from the general direction of their manure pile. Out of the yard, over the cows and bale piles, through the dozer piles, poplars, and brush, out onto the ditch grade road, past the noisy 6.2 diesel engine pulling my well traveled Suburban along. Well it sure didn't take me long to figure out what it was because I alrea
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