Engine cuts out

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Engine cuts out

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Engine cuts out - 5/12/2007 8:16:51 PM

Jer

Posts: 6
Joined: 5/12/2007
Status: offline

I have a 94 Mazda 626 Es that runs great but stalls after a bit of driving or running it out of gear for a while in the garage. Anyone have a similar problem? I know the following are OK, fuel filter changed, air mass sensor reads good, TPS sensor good ohms- adjusted, Crank position sensor OK 640 ohms.
I can crank a smooth running engine that just dies from 3,000 RPM to 0 in an instant.
After death of engine I can start it easily after waiting a few seconds.
Come on this is not an unusual problem?

Post #: 1

RE: Engine cuts out - 5/12/2007 8:33:23 PM

virgin1

Posts: 4970
Joined: 3/15/2007
Status: online

One possibility is the fuel sock located at the fuel tank pick up before the fuel pump. It may be drawing dirt into it as the pump calls for fuel and creates vacuum. Then after sitting a few minutes, releases the dirt back into the fuel tank. Just a thought....
Is the fuel pump even running when this happens?

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"There is no tool you can buy that will replace experience." - Josh Mills, C.K.DeLuxe

(in reply to Jer)

Post #: 2

RE: Engine cuts out - 5/15/2007 3:00:10 PM

Jer

Posts: 6
Joined: 5/12/2007
Status: offline

Thanks for the info Virgin1,
Fuel pump is running.
To check codes without a reader place a jumper wire in the diagnostics at first row position #3 and 2nd row #1.Turn on ignition ( just dash lights - don't start eng. ) watch for check engine light flashes ( slow flash first digit faster flashes 2nd digit ).
I just replaced the crank position sensor ( code 2 ) thinking that was it, drove it and also stalled.
Cleared all codes ( press brakes pedal with neg battery terminal disconnected, reconnected the Neg battery treminal and came up with a code 25 ( 2 slow flashes and 5 quicker flashes of the check engine light. Know anything about code 25?

I believe this is a code for fuel, your suggestion was close. It is the Regulator Control Selenoid. I tested it by blowing through and found it questionable, it does not shut off vacuum completely to build pressure in the injectors. Electronically it measures 450 ohms and activates. Vacuum from the manifold source is good.
I have found it hard to locate this part, dealers are confused part #'s on original equipment don't match replacements Mazda parts. Too many solenoids for all the different models and Mazda dealers parts dept's freak to find locally ( Chicago ) a replacement.

I will find the part and continue to report after testing. Any one else have this problem?

(in reply to virgin1)

Post #: 3