mgardster

Bondy’s Ford! Wow! Bought my first MGB there in 1974

Drennon? Are you in Birmingham?

A simple return spring was all it took... Thanks for all the suggestions. C

Nice pic, but I don't think that's the problem. Mine is not sticking out like yours in the picture. When I push the throttle back to idle, it just touches the ISC motor, so that's not what is keeping the rpms up. While I was outside trying to clean the shaft, I noticed there is only one spring on the throttle (other than the coiled one on the shaft) and it pulls with the cable in the same direction as if to help with pushing the gas pedal. Is there suppose to be another spring that pulls the throttle back to idle, opposite of the other spring? I would take a picture, but right now I'm not home. (it's a four, not a six)

Here's what I just found out. After driving it and letting it warm up, I pulled back in to the driveway and jumped out while it was still at high idle. I grabbed the throttle and pushed it back to the rest position and the idle went down to normal. I guess the ISC motor is the black plastic thing with the throttle stop on the end where the throttle is suppose to rest at idle? If that's the case, the ISC is not pushing the throttle back, it's the shaft that's not coming back to rest. Maybe it's dirty and it's sticking. You would think the big spring on the cable would pull it back to the idle rest. Is it much trouble to clean the shaft? You guys are a lot of help. Thanks!!

I'll try that in the morning, but so far, I haven't noticed anything sticking open. Just the rpms up. I've played with this thing for some time now and it's not obvious. I'll check it again. C

I'm new to this forum, but I posted the same question on another forum and didn't get any good answers. I have an 87 2.5 with 4sp, no A/C, no P/S, and everything is stock. When I start the engine, the rpms are normal, but when I give it some gas, the rpms stay high after taking my foot off the gas. If I blip the accelerator, the rpms drop to normal and stay there until I start to give it a little gas again. This is constant, every time I drive it. I've checked for vac leaks and can't find any. It's not a sticking cable. The engine has 250K miles and I've owned it for 17 years. The engine has never been opened up and the ox sensor is the same one for the last 17 years. Any Ideas?