high rpm engine problem
Thread Starter
Racer
Joined: Nov 2004
Posts: 265
Likes: 0
From: Angleton Tx
high rpm engine problem
I just got a 1990 Vette and withy my luck the engine seems to
quit or bog down at high rpm's (3800). It idles fine but when
accelorating hard it seems to have problems. It now has flowmaster
mufflers and a K & N cone air filter. There are no great places for
service in my area and the dealer is too expensive. I'd appreciate any
suggestions. Oh and my electronic heater doesn't seem to blow hot air.
Wish my wife was the same!
thxs in advance
Pete
quit or bog down at high rpm's (3800). It idles fine but when
accelorating hard it seems to have problems. It now has flowmaster
mufflers and a K & N cone air filter. There are no great places for
service in my area and the dealer is too expensive. I'd appreciate any
suggestions. Oh and my electronic heater doesn't seem to blow hot air.
Wish my wife was the same!
thxs in advance
Pete
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
start with the precats. Work your way back.
Do you have the helms manual? The best best is to get one. www.helminc.com
Where do you live? When was the last tune up?
Check Engine Light on?
Do you have the helms manual? The best best is to get one. www.helminc.com
Where do you live? When was the last tune up?
Check Engine Light on?
Race Director
Joined: Sep 2004
Posts: 13,793
Likes: 0
From: St. Peters MO Sometimes you have to prove yourself by doing alot of killing or alot of dying...
Originally Posted by bogus
start with the precats. Work your way back.
Do you have the helms manual? The best best is to get one. www.helminc.com
Where do you live? When was the last tune up?
Check Engine Light on?
Do you have the helms manual? The best best is to get one. www.helminc.com
Where do you live? When was the last tune up?
Check Engine Light on?
There are several things it could be... and the info given was rather vague.
Le Mans Master
Joined: Dec 2002
Posts: 6,715
Likes: 2
From: Santa Teresa New Mexico
Originally Posted by prodadiv
I just got a 1990 Vette and withy my luck the engine seems to
quit or bog down at high rpm's (3800). It idles fine but when
accelorating hard it seems to have problems. It now has flowmaster
mufflers and a K & N cone air filter. There are no great places for
service in my area and the dealer is too expensive. I'd appreciate any
suggestions. Oh and my electronic heater doesn't seem to blow hot air.
Wish my wife was the same!
thxs in advance
Pete
quit or bog down at high rpm's (3800). It idles fine but when
accelorating hard it seems to have problems. It now has flowmaster
mufflers and a K & N cone air filter. There are no great places for
service in my area and the dealer is too expensive. I'd appreciate any
suggestions. Oh and my electronic heater doesn't seem to blow hot air.
Wish my wife was the same!
thxs in advance
Pete
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Thread Starter
Racer
Joined: Nov 2004
Posts: 265
Likes: 0
From: Angleton Tx
It was recently tuned up and exhales through flowmaster.
I disconnected the alternator and the bog stopped.
When I reconnected it the mis started again. Can you
help me figure this out?
I disconnected the alternator and the bog stopped.
When I reconnected it the mis started again. Can you
help me figure this out?
Le Mans Master
Joined: Dec 2002
Posts: 6,715
Likes: 2
From: Santa Teresa New Mexico
Originally Posted by prodadiv
It was recently tuned up and exhales through flowmaster.
I disconnected the alternator and the bog stopped.
When I reconnected it the mis started again. Can you
help me figure this out?
I disconnected the alternator and the bog stopped.
When I reconnected it the mis started again. Can you
help me figure this out?
I don't think its the same problem on your car though.
How did you disconnect the alt, by the the belt or a lead?
Do a voltage chk on the bat and the alt.
Thread Starter
Racer
Joined: Nov 2004
Posts: 265
Likes: 0
From: Angleton Tx
Originally Posted by redwing76
I had a Ford Festiva that did the samething. The alt was bad and at night it would bog down the tiny 4 cyl. New alt no more problem.
I don't think its the same problem on your car though.
How did you disconnect the alt, by the the belt or a lead?
Do a voltage chk on the bat and the alt.
I don't think its the same problem on your car though.
How did you disconnect the alt, by the the belt or a lead?
Do a voltage chk on the bat and the alt.
Le Mans Master
Joined: Dec 2002
Posts: 6,715
Likes: 2
From: Santa Teresa New Mexico
Originally Posted by prodadiv
I disconnected the leads to the alternator. An auto parts place checked the alternator and said it was running fine, although it was checked only at idle, I'm not sure what it would be putting out at 3800 rpm. It does not miss while disconnected.
Months later it gave up the ghost.
It doesn't miss while disconnected? Man thats a wierd one.
If its the alt then your battery should be in a discharged state?
It doesn't make any sence unless your not getting enough voltage to your ignition system. But then it should run even worse with the alt dis-connected? Unless the alt is pulling a huge drain on your electrical system? It sounds like it could be your alt.
Anyway good luck this is a tricky one.
