81 driving problem
Thread Starter
Intermediate
Joined: Mar 2006
Posts: 36
Likes: 0
81 driving problem
hi, i have a 81' with a 79 distributor and carburetor in it..before i switched over the the 79 carb and distributor it ran horrible and now that i have switched when i am driving after i get up to 35mph the enging will not rev up and and the car will not pass 35mph. does anyone know what causes this?
thanks,
-Nick-
thanks,
-Nick-
Thread Starter
Intermediate
Joined: Mar 2006
Posts: 36
Likes: 0
the car revs up when in neutral to 4000+rpms, how ever when driving, it only reaches about 1200-1500 rpm. w/ top speed of about 35 mph. it was doing the same thing before the carb/dist. swap. It does have a catalyic convert. exhaust gas is coming out the tail pipes so I was thinking are ok. got a brand new fuel pump also.
Le Mans Master
Joined: Jan 2006
Posts: 9,192
Likes: 27
From: Boca Raton Florida
Ahh, there is a clue, it was doing this before the swap.
couple things to verify;
#1 cat is not plugged up or mostly so
#2 Timing ring on ballances has not slipped
#3 proper indexing of the distributor
I would start with the timiong issues, then remove the cat and see what happens
couple things to verify;
#1 cat is not plugged up or mostly so
#2 Timing ring on ballances has not slipped
#3 proper indexing of the distributor
I would start with the timiong issues, then remove the cat and see what happens
Race Director
Joined: Jul 2004
Posts: 12,672
Likes: 329
From: Scottsdale Arizona
Thread Starter
Intermediate
Joined: Mar 2006
Posts: 36
Likes: 0
Idling @ 700, I have the timing set at 6 degrees BTC with vacuum advance hose plugged, is this correct?
when we pull the vacuum hose off the dist. there is a definite change in engine rpm. thanks for the ideas, will double check the timing
when we pull the vacuum hose off the dist. there is a definite change in engine rpm. thanks for the ideas, will double check the timing
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Melting Slicks
Joined: Mar 2006
Posts: 2,465
Likes: 0
From: Orange Park Fl
This is one of the main reasons I encourage people not to dump the '81 CCC system the first time the car hiccups. If your car is not running correctly, diagnose the problem, don't just start replacing things. If it had the problem before, and you replaced the distributor and, I assume, made an educated attempt to set it up correctly, I doubt timing is the problem (two distributors, same timing issue: not likely). Get a GM service manual and start going through the diagnosis littany. God bless, Sensei
