1975yellowBSPZ Posted May 16, 2004 Share #1 Posted May 16, 2004 I finally have my second motor in my car, go to start it and... it turns over, starts, idles ok for a second and starts reving like it taking off to outerspace. I had to kill it. tried again, same thing.Odd thing it didn't run rough (ie bad timing) and it started right up, it just wanted to rev up like a dyno run without my foot on the gas.Its a 280 with FI and pretty much everything have been apart, so I just need to know if anyone knows what I should look at to narrow this down. I hope it didn't damage the motor...HELP HELP HELPany one in Dallas is more then welcome to stop by and check it out, It's quite a sight at present...Bryan:mad: Link to comment https://www.classiczcars.com/topic/11742-help-car-revs-out-of-control/ Share on other sites More sharing options...
Zrush Posted May 16, 2004 Share #2 Posted May 16, 2004 I'm not sure and my husband is asleep on the couch now. But could there be an adjustment within the throttle body?Vicky Link to comment https://www.classiczcars.com/topic/11742-help-car-revs-out-of-control/#findComment-81294 Share on other sites More sharing options...
sweetgrrl Posted May 16, 2004 Share #3 Posted May 16, 2004 well, i would start with the simple things first. first i would make sure that the butterfly (throttle plate) isnt stuck open. you should be able to pull the air flow meter and peek inside the throttle body. if it is open i would look at the lingake to make sure it isnt binding. if its closed like it should be, i hate to say it, but i would be at a loss. Link to comment https://www.classiczcars.com/topic/11742-help-car-revs-out-of-control/#findComment-81325 Share on other sites More sharing options...
Fun_in_my_z Posted May 16, 2004 Share #4 Posted May 16, 2004 Check your choke. And your idle adjustment.It sounds like it stuck open. Im not sure how to adjust the idle on these cars yet im still new to these. but i would almost bet its your idler. Link to comment https://www.classiczcars.com/topic/11742-help-car-revs-out-of-control/#findComment-81331 Share on other sites More sharing options...
TomoHawk Posted May 16, 2004 Share #5 Posted May 16, 2004 I thi9nk I would suggest you also check the wiring to the AFM. The throttle is mechanical, and the dizzy is mechanical, so those can't go wild without the engine wild first. The rest of the wiring is temp, oil & water sensors, plus alternator.the only thing I can think of is the computer/AFM not communicating, so the computer thinks it's running at WOT...Whatever the problem really is, is simple....when you find it. Link to comment https://www.classiczcars.com/topic/11742-help-car-revs-out-of-control/#findComment-81332 Share on other sites More sharing options...
1975yellowBSPZ Posted May 17, 2004 Author Share #6 Posted May 17, 2004 I think I have it narrowed down to a selectively sticky throttle cable. (yes cable) It articulates properly except it binds the last few centemeters and sticks open enough to make the crazy high idle. I cranked it down so I would idle really low and it seems to act a bit better. But there is still an issue with it binding and def. something wrong w/ the motor. I either have a mechanical problem or an exaust leak bc it just sounds awful.thanks for your replys, it's always something easy (?)more work to do...Bryan Link to comment https://www.classiczcars.com/topic/11742-help-car-revs-out-of-control/#findComment-81342 Share on other sites More sharing options...
Yarb
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