RPM's drop under braking load.
Thread Starter
2nd Gear Member
Joined: Oct 2006
Posts: 460
RPM's drop under braking load.
OK. I replaced the intake manifold, the carb, all the hoses and the brake booster. There is absolutly no vacuum leak on the car, it runs perfect and I have the warm idle set at 700-750 RPMS. Here is my problem....(same one I hade before swapping everything out) If I put the car in drive or reverse it idles fine. However, when I apply the brakes while it's in gear the cars RMPS drop by 200. It isn't when I first touch the brakes, it's when the brakes actually stop the wheels that the drop happens (it's on blocks) . I know it's not a vacuum leak cause I tried it with the line unhooked and plugged and it also doesn't do it in park or neutral. It's when the brakes are under load that the drop happens. Any suggestions would be greatly appreciated. Thank you.
6th Gear Member
Joined: Oct 2006
Posts: 8,162
From:
RE: RPM's drop under braking load.
might be your torque converter when you drive it and slow down does it rev down and do like a spike where it revs up or any werid noises from the tranny. have you changed the tranny fuild and filter ever on it
3rd Gear Member
Joined: Feb 2007
Posts: 551
RE: RPM's drop under braking load.
ORIGINAL: sxs191
OK. I replaced the intake manifold, the carb, all the hoses and the brake booster. There is absolutly no vacuum leak on the car, it runs perfect and I have the warm idle set at 700-750 RPMS. Here is my problem....(same one I hade before swapping everything out) If I put the car in drive or reverse it idles fine. However, when I apply the brakes while it's in gear the cars RMPS drop by 200. It isn't when I first touch the brakes, it's when the brakes actually stop the wheels that the drop happens (it's on blocks) . I know it's not a vacuum leak cause I tried it with the line unhooked and plugged and it also doesn't do it in park or neutral. It's when the brakes are under load that the drop happens. Any suggestions would be greatly appreciated. Thank you.
OK. I replaced the intake manifold, the carb, all the hoses and the brake booster. There is absolutly no vacuum leak on the car, it runs perfect and I have the warm idle set at 700-750 RPMS. Here is my problem....(same one I hade before swapping everything out) If I put the car in drive or reverse it idles fine. However, when I apply the brakes while it's in gear the cars RMPS drop by 200. It isn't when I first touch the brakes, it's when the brakes actually stop the wheels that the drop happens (it's on blocks) . I know it's not a vacuum leak cause I tried it with the line unhooked and plugged and it also doesn't do it in park or neutral. It's when the brakes are under load that the drop happens. Any suggestions would be greatly appreciated. Thank you.
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