Rough idle/stalling
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Joined: Jun 2005
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Rough idle/stalling
Hi, my 78 truck has a 302 that recently began idling rough (park or drive) and stumbles at cruise speed. It also stalled completely once. I parked it and after only about 30 seconds, I was able to restart it and 'limp' back to the house. I replaced the fuel filter, but it didn't remedy the problem. I am not even so sure that this is a fuel problem, but maybe electrical. I hope that someone can help me here. Thanks!
Mark
Mark
Elder User
Joined: Jun 2003
Posts: 886
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From: Houston/Hope BC
go to the basics:
I would start with a compression test and see what you got. No point looking for a simple problem if you have a major one. If these #'s are reasonable then...
air/fuel: bad pump (check pressure and volume), clogged jets, clogged pickup, vacuum leak, bad gas.
got good healthy spark and at the right time?
It may be time for a tune-up A new set of plugs/wires/cap/rotor can do wonders.
GL, welcome to FTE, check back if you need more info.
I would start with a compression test and see what you got. No point looking for a simple problem if you have a major one. If these #'s are reasonable then...
air/fuel: bad pump (check pressure and volume), clogged jets, clogged pickup, vacuum leak, bad gas.
got good healthy spark and at the right time?
It may be time for a tune-up A new set of plugs/wires/cap/rotor can do wonders.
GL, welcome to FTE, check back if you need more info.
FTE Leadership Emeritus
Joined: Jan 2003
Posts: 161,999
Likes: 75
From: 3rd Rock
Originally Posted by Greenwood78
Hi, my 78 truck has a 302 that recently began idling rough (park or drive) and stumbles at cruise speed. It also stalled completely once. I parked it and after only about 30 seconds, I was able to restart it and 'limp' back to the house. I replaced the fuel filter, but it didn't remedy the problem. I am not even so sure that this is a fuel problem, but maybe electrical. I hope that someone can help me here. Thanks!
Mark
Mark
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