Edmunds Answers

Answers

  • karjunkie 02/25/10 2:14 pm PST

    I suggest you start with a simple test: try and start the car and then pull a spark plug out. If it is wet, you have a spark problem meaning the coil(s), distributor (if any) or the CPS sensor is bad. To double check, disconnect the other spark plug wires; hold the spark plug against the engine with insulated pliers while a helper turns to engine over to see if you have a spark. If the spark plug is dry, you have a fuel delivery problem meaning fuel pump clogged fuel filter or a bad fuel pressure regulator. You can check the FPR by pulling the vacuum hose of of it and check for fuel in the hose. If it has fuel in there, you need to replace the FPR. A $40 pressure gauge you can get from any auto parts store can be attached to the schrader valve on the fuel rail to check for pressure. On most vehicles, the pressure should be at least 42-45 psi. Good luck and let me know if you have any follow up questions!

ADVERTISEMENT

Top Nissan Xterra Experts View More

Rank Leader Points
1. MrShift@Edmunds 105
2. karjunkie 70
3. morin2 35
4. zaken1 35
5. actualsize 25
6. docj 25
7. laltazan 25
ADVERTISEMENT