Here’s the scenario. Customer drives car in needing engine replacement. Install replacement engine and car no longer starts as it should. You’ve checked everything you can think of and now you need the help of the community. SureTrack community member discountautoservicetn had a Chevrolet Spark in their shop that had no spark and wouldn’t start after doing an engine replacement. They posed the question to the community, and with the help of fellow community member salvaje07, dmckemie12 and others, they were able to resolve the issue quickly.
The following Community Fix summarizes the interaction between members of the community that led to the solution.
2008 Dodge Avenger R/T 3.5L
No start, repaired bent tabs on flywheel.
No start after engine swap.
Diagnostic Steps Performed/Parts Replaced
Vehicle needed engine replaced. We put a 2007 Sebring engine in. Both are 3.5 High Output 24v. Everything from the old motor was swapped onto the new one including intake, injectors, wiring harness and accessories. Spark plugs are good. Getting plenty of fuel. The car ran and drove in on the old engine, wasn’t hard to start at all. With the new engine, it will crank forever. If you pedal the gas slowly and hold the pedal all the way down to clear the cylinders it will eventually start sometimes after five or ten minutes of cranking. It then will throw a code for crank sensor intermittent. We have checked all the wiring, sensors, scoped the sensor at PCM and have came up with good readings from all of it. The car also will continue cranking when the key is released for up to 30 seconds when it won’t start. The only way I can get the car to start is to kill the signal wire from crank sensor (CKP) to PCM. The car will start in that situation after about eight or ten seconds. Throws a CKP circuit code for good reason obviously. I feel like I have checked everything. ANY help would be great!
In the end this was two bent tabs on the pickup on the flywheel for the CKP sensor.
Straightened bent tabs on the pickup through the starter hole and it ran great.
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