Skip the auto shop - Our mechanics make house calls

Q: Engine seems like it's out of time

asked by on

I've replaced the crankshaft,camshaft,and throttle position sensors. The car is now throwing no codes. I have good fuel and spark, it wants to run but it won't.it backfires threw the air cleaner. Is it possible I have put the pulley on wrong and it's out of time? I just don't know what to do next

My car has 187900 miles.
My car has an automatic transmission.

A: Hello, thanks for writing in. It is surpris...

Hello, thanks for writing in. It is surprising to me that there are no codes stored. Nonetheless, I suspect your timing chain and gear set are worn sufficiently that the timing chain has jumped one or more teeth, and your engine is indeed "out of time". This engine is very durable, but the timing chain set is the weak link for high-mileage cars such as yours, and the backfiring through the intake is a classic symptom.

I would recommend having a engine backfire inspection completed by a mobile, professional mechanic, such as one from YourMechanic, to diagnose this problem, get an accurate assessment of damage and cost estimate for repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: My 1990 Toyota pick up 4WD will not run

Hi there. You've got some work cut out for you. It sounds like either the timing chain could be out of time or the distributor is not timed correctly. First, set cylinder 1 to top dead center and remove...

Q: To much fuel and not enough air flow.

This sounds like a MAF (mass air flow) sensor problem. As you may already know, this regulates the flow of air into the engine allowing the proper air/fuel mixture to be injected into the engine. When this is faulty, I...

Q: Can I LEGALLY switch my front and rear bumpers to Isuzu Impulse bumpers?

You should not have any problems as long as the VIN number on the car and your registration still match. People do all sorts of ground effects and other body changes that change the way the body looks. If you...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.