Put on headers, engine won't idle?
Thread Starter
Melting Slicks
Joined: Apr 2000
Posts: 2,005
Likes: 0
From: Ridgecrest CA
Put on headers, engine won't idle?
I put full length headers on this week, but now that they are hooked up to the exhaust, the engine is having trouble idling.
Once it starts up, if I rev up to about 1500, it will come back down to 850-950 and idle there as long as I keep the transmission in park or neutral, but once I put it in gear, it goes down to 500-550 and stumbles.
It is much hotter now than it has been any of the rest of the time I have had it here, but I would not expect that to make much of a difference. I replaced the original ramshorn manifolds, though the heat riser was frozen shut.
Does putting the headers on make that much of a difference to the tuning? If so, can anyone recommend a good book on tuning the quadrajets?
Once it starts up, if I rev up to about 1500, it will come back down to 850-950 and idle there as long as I keep the transmission in park or neutral, but once I put it in gear, it goes down to 500-550 and stumbles.
It is much hotter now than it has been any of the rest of the time I have had it here, but I would not expect that to make much of a difference. I replaced the original ramshorn manifolds, though the heat riser was frozen shut.
Does putting the headers on make that much of a difference to the tuning? If so, can anyone recommend a good book on tuning the quadrajets?
Safety Car
Joined: Jun 2005
Posts: 3,841
Likes: 0
From: Inver Grove Minnesota
Did you double check to make sure you got all of your vacuum lines back on? When I put mine on I didn't have to mess with the carb or the timing, It was just like instant power boost. Just look it over and make sure everything is back on correctly.
Instructor
Joined: Nov 2005
Posts: 232
Likes: 0
From: Millersville Maryland
Originally Posted by Berserker78
I put full length headers on this week, but now that they are hooked up to the exhaust, the engine is having trouble idling.
Once it starts up, if I rev up to about 1500, it will come back down to 850-950 and idle there as long as I keep the transmission in park or neutral, but once I put it in gear, it goes down to 500-550 and stumbles.
It is much hotter now than it has been any of the rest of the time I have had it here, but I would not expect that to make much of a difference. I replaced the original ramshorn manifolds, though the heat riser was frozen shut.
Does putting the headers on make that much of a difference to the tuning? If so, can anyone recommend a good book on tuning the quadrajets?
Once it starts up, if I rev up to about 1500, it will come back down to 850-950 and idle there as long as I keep the transmission in park or neutral, but once I put it in gear, it goes down to 500-550 and stumbles.
It is much hotter now than it has been any of the rest of the time I have had it here, but I would not expect that to make much of a difference. I replaced the original ramshorn manifolds, though the heat riser was frozen shut.
Does putting the headers on make that much of a difference to the tuning? If so, can anyone recommend a good book on tuning the quadrajets?
