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mrdap
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Joined
Jul 15, 2012
Last seen
Jun 29, 2025
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mrdap
replied to the thread
'88 350 TBI Engine Noises and Idle
.
Probably should pull all the spark plugs and have a look. And do a compression test. I hate that.
Jun 16, 2025
mrdap
replied to the thread
'88 350 TBI Engine Noises and Idle
.
It was a bit above normal idle. I had to put a sledge hammer on the throttle to keep it running. But no load, not racing. Fast idle...
Jun 16, 2025
mrdap
replied to the thread
'88 350 TBI Engine Noises and Idle
.
No fuel pump push rod.....TBI. electric fuel pump
Jun 15, 2025
mrdap
replied to the thread
'88 350 TBI Engine Noises and Idle
.
Gremlins! Nasty. Per above: CODE 33 MAP SENSOR (SIGNAL VOLTAGE HIGH) ALL ENGINES IF ENGINE IDLE IS ROUGH, UNSTABLE The fuel pump is...
Jun 15, 2025
mrdap
replied to the thread
'88 350 TBI Engine Noises and Idle
.
I will check into that. There was (incompetent) transmission work done twice. Thanks.
Jun 15, 2025
mrdap
replied to the thread
'88 350 TBI Engine Noises and Idle
.
I checked the code: CODE 33 MAP SENSOR (SIGNAL VOLTAGE HIGH) ALL ENGINES IF ENGINE IDLE IS ROUGH, UNSTABLE Tomorrow I will clear codes...
Jun 15, 2025
mrdap
replied to the thread
'88 350 TBI Engine Noises and Idle
.
Sounds good
Jun 14, 2025
mrdap
posted the thread
'88 350 TBI Engine Noises and Idle
in
Tech Discussion
.
Strange problem with my 1988 GMC Jimmy today. 350 TBI, 700R4, 120,000 miles 104° F Arizona Driving, everything is normal. Good oil...
Jun 14, 2025
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