Engine cuts out while driving......then starts back up by its self

[kenika65]

uh ya they are cheap and 50cents at a junk yard good place to start!

[FredK]

Well, the DME is powered from one leg of the main relay. Can you start the car, and tap on the main relay (should be the only one with 5 prongs, if I recall correctly), and get the car to stumble?

[StereoInstaller1]

No, can't be timing...unless you have a funky chip.

[StereoInstaller1]

Yup. Speedo does not come from main relay, so main relay is still your best chance.

You can test it with 2 paperclips..thunking it will only show an absolutely trashed one, but not like you are describing.

[FredK]

The long pull was there prior to me changing the timing belt. After I changed the belt, the timing marks matched up.

[Desaevious]

Some cheap-ass PO must have screwed you over. Find him and kick his ass.

[FredK]

Some cheap-ass PO must have screwed you over. Find him and kick his ass.

Word.

[nasty50]

Sorry to hijack your thread but I have a similar problem but mine actually happens if I try to flooor it all the way down in the freway,looses power as if the engine dies but as soon as I let the pedal up it will down shift and come back to life.again sorry its just there's good points here I wanted to see if its related in any ways,help guys.

[FLarimer]

OP - Just had a similar experience with my e30M3. Driving normal, then dies for a moment and restarts. Freeway and city streets - didn't seem to matter. Traced it to loose solder joints for the Ignition transistor inside the DME. Do you have access to a known, good DME? Try swapping DME's and see if the problem goes away.

[nasty50]

OP - Just had a similar experience with my e30M3. Driving normal, then dies for a moment and restarts. Freeway and city streets - didn't seem to matter. Traced it to loose solder joints for the Ignition transistor inside the DME. Do you have access to a known, good DME? Try swapping DME's and see if the problem goes away.

noob here,whats dme?

[Adrian_Visser]

I had a similar problem a couple months ago, the car would cut out for a moment while driving when cold and during cold weather. I figured it was the main relay, turned out the problem was the DME. The problem eventually resulted in the DME frying its injector drivers and the car not starting at all (injectors wide open at all times total flooding of the engine.) New DME and all has been well since.

[iwantspeed]

OP - Just had a similar experience with my e30M3. Driving normal, then dies for a moment and restarts. Freeway and city streets - didn't seem to matter. Traced it to loose solder joints for the Ignition transistor inside the DME. Do you have access to a known, good DME? Try swapping DME's and see if the problem goes away.

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I had a similar problem a couple months ago, the car would cut out for a moment while driving when cold and during cold weather. I figured it was the main relay, turned out the problem was the DME. The problem eventually resulted in the DME frying its injector drivers and the car not starting at all (injectors wide open at all times total flooding of the engine.) New DME and all has been well since.

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same thing happened to me.
I bought the car in december
finally fixed it by swapping out the dme

I had a similar issue

I replaced quite a few things trying to diagnose it.

cap
rotor
plugs
I didnt replace the wires but I plan on doing that soon.

air filter
fuel filter
oil change
oil filter
various vacuum components
o2 sensor
main relay
ecu relay
o2 sensor heater relay
crank position switch
main engine ground strap
fuel pump
coolant temp sensor(blue base goes to dme)


mine was fixed by swapping out the ecu with a stock ecu with a stock chip.
I assume there was a cold soder joint, a broken joint or something of that nature.

[BDSax]

wow, i had problems like this with my m20. so i just changed motors.

[Kershaw]

wow, i had problems like this with my m20. so i just changed motors.

the simple fix.

[iwantspeed]

it would still have the same problem if you reused the same ecu