1991 Isuzu Trooper 2.8 will not start It is getting fire and fuel and cranking over like a champ but will not start any ideas?

Answer

My Tooper was doing the same, get some throttle body (fuel ingector) cleaner and put it in with a full tank of gas. After about a 1/4 of a tank of use, it starts right up no prob.

Answer

Check your crank and or camshaft position sensors. If your camshaft position sensor or circuit is bad your car will turn over, you will bet power to your plugs if you test them and your fuel system will be pressurized but your car will not start.

You need to check that your timing chain is stil intact. Get someone to help. Take the oil filler cap off and look down in the hole. Have your faithful assistant try to crank it while you watch to see if the cams are moving. If they don't then the chain has most likely given up the ghost. If there is gas and fire and the chain is good it should at least crank, might not run long but it will crank.

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Make sure you're getting a strong blue spark, not dull orange. The ignition module is a common culprit, especially when the heat sink grease on them starts to get old and they overheat.

Anser

Don't forget that it will also not fire if there is no oil pressure. (faulty oil pump or clogged filter or otherwise)

First answer by ID1178122978. Last edit by Toneduke. Contributor trust: 0 [recommend contributor]. Question popularity: 45 [recommend question]