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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Ways to determine if the timing belt snapped on a '97 Honda Accord

It's a '97, so the car has a distributor. One fairly quick way to check is to take the distributor cap off. It has just two screws and it is really easy to get off. Have somebody crank the engine...

Q: Will not start

If the last symptom is failure of the motor to turn, you just want to confirm that by removing the spark plugs and ensuring the manual transmission is not engaged. If you still cannot turn the motor by hand using...

Q: How can I reset the computer

Unhooking the battery and jumping the positive and negative terminals should clear any trouble codes. Be sure to unhook both as this can be very dangerous if not done properly. If not experienced in doing this, I would recommend...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...