1968 Plymouth Fury Fuel Related Question

68plymouth383

68plymouth383

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I was out driving my fury today. I had gotten stuck in traffic for about 15 minutes idling. It was about 95 Degrees today. The cars temp held great, But when I went to go the car acted like it ran out of gas. Stumbled real bad. I limped it into a parking lot, i put it in park and revved it up. The ran out of gas symptoms stopped..... but later sitting at lights it had more of a lazy stumble. The car has a fresh rebuild 440, all new fuel system, all new ignition system. I replaced the fuel filter a month and a half ago. The fuel pump is new. If you guys have any ideas or have gone through this also I would appreciate the help. Thanks
 
I had a similar problem. I bought a performance coil and it crapped out a month after I installed it. Same symptoms......I put the 35 year old coil back on....it's still on my NYB and running.
 
the car acted like it ran out of gas. Stumbled real bad. I limped it into a parking lot, i put it in park and revved it up. The ran out of gas symptoms stopped
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This topic needs to be a Sticky.
We have Stickies here, right?
 
68plymouth383 said:
Coil is mounted in the factory position on top of the intake manifold. the intake I'am using is a Edelbrock performer aluminum.
Click to expand...

Same manifold I have. I had a Mallory Performance coil and it started to crap out when I was pulling up to red lights in 90+ degree weather. Acted like it was running out of gas. It did that a few more times and then just quit all together. Luckily I wasn't too far from home and I put the 35 year old coil back on and it fired right up. It's still on my NYB now. I took the Mallory back to AAP and bought a stock coil that is in a tote in the trunk with a few other parts....ballast resistor, ignition module, fuel pump.
 
68plymouth383 said:
I was out driving my fury today. I had gotten stuck in traffic for about 15 minutes idling. It was about 95 Degrees today. The cars temp held great, But when I went to go the car acted like it ran out of gas. Stumbled real bad. I limped it into a parking lot, i put it in park and revved it up. The ran out of gas symptoms stopped..... but later sitting at lights it had more of a lazy stumble. The car has a fresh rebuild 440, all new fuel system, all new ignition system. I replaced the fuel filter a month and a half ago. The fuel pump is new. If you guys have any ideas or have gone through this also I would appreciate the help. Thanks
Click to expand...

Very often, this kind of problem is coil-related. The damn thing is fine when the coil is cool, but it causes this kinda problem when the coil heats up. The hotter the coil gets, the worse the problem is. I've seen this mostly with after-market coils such as Crane, etc.
 
Yep, especially when it's mounted on the manifold. My experience has been the coil will only work after it cools off a few times......then it will eventually quit working period.

A quick check to see if it's a fuel or spark problem when it won't start is to give it a shot of starting fluid with the air cleaner off. If it fires........it's a fuel problem. If it doesn't fire.....it's a spark problem. Be care with starting fluid, it is very flammable!!!
 
Probably already know this, but you want to remount the coil somewhere off the intake manifold if possible.
 
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