RE: [DML] VIN 1913 Needs some help ...

["Joseph Kuchan" <josephkuchan@xxxxxxxxxxx>]

Hmmm. I think there could be a number of things that could cause such 
symptoms. Unfortunately intermittent things are usually a bear to find and 
fix, and you can't just slap an OBDII reader on the car to find out what's 
happening.

Intermittent timing issues?
Intermittent/poor spark?
Ignition crossfire?
Intermittent/poor fuel delivery?
Timing chain jumped a tooth or too slack?

To begin with look carefuly around your engine compartment for anything 
obvious like electrical connectors that have fallen off. Next, think "tune 
up" if this hasn't been done in a while just to get that out of the way of 
further troubleshooting. Verify that your distruibutor cap, rotor, wires, 
and plugs are all in good condition. Make sure the initial timing is at 13 
degrees BTDC and does not jump around. Make sure the secondary (high 
voltage) wire is making solid contact at the coil. Sometimes the rubber boot 
can push itself off the tower and it naturally drags the wire with it.

Next what about your fuel delivery? The last thing you mentioned before you 
experienced the problem was that you filled up. Was the gas bad?

Does your air sensor vane move freely inside the cone or is it binding or 
sticking? If it sticks the car could run lean or rich, and either situation 
might cause some of the driveability symptoms you mention.

How's your fuel pump and fuel pickup hose? The hose can collapse which would 
make the car run lean. A lean engine could backfire and cause the pops you 
heard as well as lack of power.

Flames out the tail pipe is most likely unburned fuel igniting in the 
exhaust. If one or more of your cylinders is not firing properly they are 
dumping a rich mixture into your exhaust manifolds where it can be ignited 
by exhaust from cylinders that are firing.

You'll probably have to systematically check/correct/eliminate possible 
causes until you come upon the cause or causes of this. Only actually doing 
the troubleshooting will lead yiou to the answer, but I suspect fuel 
delivery issues. If you have a K-Jet fuel pressure gauge, look at your fuel 
pressures. (System pressure and control pressure) to make sure they are in 
spec.

Have you done anything to the car recently? If so, what?

Good luck!

-Joe Kuchan

>From: "Adam Lee" <delorean852003@xxxxxxxxx>
>Subject: [DML] VIN 1913 Needs some help ...
>
>I was driving my car the other day and had no problems.  I filled up
>with gas and drove home. On the way home she started kinda "cutting
>Out". The engine would be running but I had no control over the pedal
>(no Acceleration). Then it would kick back on and I would have power
>again.



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