02 Nav check engine light, stall!! Help

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Oct 20, 2005 | 02:59 PM

xfordtech

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02 Nav check engine light, stall!! Help

Drving to work this morning, my 02 Navigator check engine light came on and stalled. Now has a crank/no start. Pulled codes, P0452 (evap pressure low), P0453 (evap pressure high), P1450 (fuel tank vacuum no bleed), P1451 (evant vent control valve mafunction). After awhile started up fine, but afraid to drive far in case it would strand me again. Also stalled going into turns, twice. Any ideas or anything common to 02 Nav's that I should know about. I don't want to take it to the STEALER. Any help would be greatly appreciated.

Feb 12, 2006 | 08:58 PM

Rickdj

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you might try replacing the fuel cap as a faulty cap can affect the pressure in your tank, thats the easiest check. Have you done any work on your fuel system?

Feb 13, 2006 | 08:09 AM

projectSHO89

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From: St Louis

Quote:

Originally Posted by Rickdj

you might try replacing the fuel cap as a faulty cap can affect the pressure in your tank, thats the easiest check. Have you done any work on your fuel system?

Don't waste money on a cap, it won't cause any of those codes.

FWIW, none of those codes indicate any problem that will cause the engine to either stall or to not start. They're all for your evaporative emissions control system.

I would be suspicious of your fuel pump (weak?) or its pickup in the fuel tank (partially clogged). How much fuel was in the tank at the time it stalled? A fuel pressure test would be in order.

Hmmm.. just though of something. When it stalls, jump out and loosen the fuel cap. Listen for the sound of air whooshing INTO the tank. If you hear this, your evap system could have a problem in that it isn't letting air into the system to replace fuel that has been consumed. If so, those evap system codes could be pointing towards the problem after all.

Steve

Feb 13, 2006 | 08:22 AM

xfordtech

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Wow, just realized that I never brought closure to this post!

The problem was actually an electrical one. The vehicle has 22 in rims and tires. When making hard left turns, the tires would pinch a wiring harness against the left frame, causing electrical shorts all over the place. I exposed the loom, performed wiring repairs to the broken wires and relocated the loom. Whalla!!

It pays to perform visual inspections before pulling your hair out trying to find weird stuff. Multiple codes that don't make any sense usually indicate strange circumstances.

Thanks for the info as usual.