High Idle...HELP!

danny

New Member
May 11, 2010
9
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0
Oregon
I just put a new engine in my 87 n/a and now it is idling at about 2000-2500 rpms. How do I fix that? I also have a bunch of stuff that has no wire/plugs for them from the wiring harness and some vacume hoses that idk where to put.....soo close to being finished, but yet still so far. I need help please I have to be able to get to class on thursday!
 

danny

New Member
May 11, 2010
9
0
0
Oregon
well my trottle cable isnt stuck and i have tryed to hook up my vacuum lines like the diagram says and every other way i could see possiable....idk if the diagram matches the engine....and still idling at 2-3k. i also tryed moving the throttle positioning sensor...did nothing. could it be the cold start sensor? one thing i did find out is that if i hook up the vacuum line off the intake manifold, the one nearest to the driver seat, i can get it to drop to 1.5-2k rpms. but now it wont start, idk y but i think thats just something minor. any more ideas?
 

danny

New Member
May 11, 2010
9
0
0
Oregon
it is consistently high. oh ya i also tryed putting my old throttle body on it.....made it run like shit but idled at 1.5k the after a bit started to rise and drop
 

danny

New Member
May 11, 2010
9
0
0
Oregon
OHHHHH i see what your saying, but ya we tryed that with acetylene and didnt find any leaks. still try it with the carb cleaner?
 

danny

New Member
May 11, 2010
9
0
0
Oregon
ok well idk what the hell is going on, now its starting fine but still high idle. got all the vacuum lines hooked up the same as the diagram says. didnt get to check for leaks again yet. soo i was told i should replace my new ICV and cold start injector with my old engines ICV and cold start injector, but the old ICV is completely different then my new one. should i buy a brand new ICV? BTW i mean new as in new to me, not new from the store. another Q how do i tell what year my engine is?
 

danny

New Member
May 11, 2010
9
0
0
Oregon
well tried the carb cleaner, tried hooking the vac hoses every way possiable... idk what to do. can anyone help???