Skip the auto shop - Our mechanics make house calls

Q: engine wont restart when hot, no spark P0340 has 12v on both connectors, freq from 5-11hz when cranking

asked by on

1999 pathfinder 130000 miles starts fine when its cooled down, can drive for hours with no problem as long as it not turned off. When trying to restart when hot, it cranks,but has no spark. If I keep cranking I get error P0340 and knock sensor. Knock is from un burned gas from trying to start when hot. I Have 12 volts on 2 wire connector and 12v on 6 wire connector to distributor. On circuit 1 signal from pcm it varies from 5hz to 11hz, 2nd wire from left has good ground as is the other ground, The distributor has been replaced because the original had rusted, at first thought it was bad new distributor so bought another but has the same problem. I took it to a shop, they said it was the timing, then said the harmonic balancer slipped and adjusted timing the best they could. right out of the shop had the same problem, wont start when hot, I have taken apart all wire connectors and cleaned with contact cleaner, makes no difference, any ideas?

My car has 130000 miles.
My car has an automatic transmission.

A: Since the crank position sensor gets its ti...

Since the crank position sensor gets its timing signal off the damper, I would first replace the damper to be sure timing was correct. The fact that this failure occurs after a "heat soak" cycle, and the P0340 code is a cam position sensor error, I would be suspicious of both the crank and cam position sensors. If the crank position sensor is dead, and the ECM is defaulting to the cam position sensor, problems with incorrect timing will be more acute. I would recommend having a car is not starting service 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・Save up to 30%

Get a quote

What others are asking

Q: Runs fine with the map sensor vacuum line plugged off

Hello, the map sensor is an input of engine load. When the map sensor is disconnected it will set a fault code which is emission base and check engine will come on,this cause the system to go into a default...

Q: My car wouldn't start until I sprayed some starter spray

Hello. Typically when one has the results you have with starter spray, you are facing a fuel issue. Did the vehicle continue to run after it started, or did the vehicle start for a moment and then stall? When you...

Q: Crank but not start, There is spark and fuel spray in injector, I change the PCM and distributor box but still the same no start

If you are getting spark and fuel to the engine then the only thing left to check is the compression in the engine. Have a compression test done to see if the timing belt may have jumped timing. You should...

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 to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...