Guest breather Posted March 31, 2013 Share Posted March 31, 2013 Hi! I have a 1990 Reatta in which I just changed the intake manifold. Thought I had everything reinstalled how it came off but evidently NOT. The car does start but shuts right off. the only thing I could guess is that the vacuum lines are no correct or not . Upon checking, I don't see any loose vacuum lines or electrical connections dangling or loose. Any ideas?? I turned the idle up to keep the car running so I can do some errands in need. It slams into gear because of the high idle and I imagine is not too good for the tranny etc. PLEASE HELP! Link to comment Share on other sites More sharing options...
Ronnie Posted March 31, 2013 Share Posted March 31, 2013 (edited) Check the connection to the Idle Air Controller (IAC). Edited March 31, 2013 by Ronnie (see edit history) Link to comment Share on other sites More sharing options...
Guest Mc_Reatta Posted March 31, 2013 Share Posted March 31, 2013 Did you jostle the MAF? Try disconnecting it and see if it runs better.How did you raise the idle? It's not adjustable. Link to comment Share on other sites More sharing options...
ol' yeller Posted March 31, 2013 Share Posted March 31, 2013 I had a similar situation on a long departed '90 Reatta after I cleaned the MAF which I had removed. It seems that it is easy to reinstall the MAF slightly cocked and therefore create a huge vacuum leak. Make sure it is seated properly on the manifold. Link to comment Share on other sites More sharing options...
2seater Posted March 31, 2013 Share Posted March 31, 2013 If you can keep it running with increased throttle, the IAC as mentioned is possible, or a large vacuum leak as you surmised. A small leak should just raise the idle. The MAF suggestion is excellen as well. A vacuum gauge will give a good idea of a leak or not. Certain the intake manifold is sealed to the head? All plugs to the sensors installed: water temp, IAC, TPS and MAF?It is possible to change the minimum idle speed with the throttle stop screw and nut combination where the throttle arm hits. If so, it will need to be returned to the correct position after fixing the stalling problem. The only way I know of doing so is to force the IAC closed in the overide, disconnect it, and set the stop screw down to about 500 rpm idle, and lock it down. The IAC will pick up the rest to the correct idle speed. Link to comment Share on other sites More sharing options...
Ronnie Posted March 31, 2013 Share Posted March 31, 2013 It will be interesting to see what is causing this problem. I think if it was a vacuum leak or a bad sensor the IAC would be trying to compensate and there would be some RPM fluctuation before the engine dies that he didn't mention. I always look forward to hearing the outcome of a good mystery. Link to comment Share on other sites More sharing options...
padgett Posted March 31, 2013 Share Posted March 31, 2013 Key is what the IAC is being commanded and whether any codes are set. Throttle up screw is designed so the butterflys can close completely (IAC is in parallel) without sticking.Since everything is discoonnected when changing a manifold, that is where to start. BTW idle over 1400 rpm when warm is liable to set a code. Link to comment Share on other sites More sharing options...
harry yarnell Posted March 31, 2013 Share Posted March 31, 2013 Check the PCV grommet. Bet that's your problem. Link to comment Share on other sites More sharing options...
Guest crazytrain2 Posted April 1, 2013 Share Posted April 1, 2013 Call me crazy (lol) but try disconnecting the negative terminal on battery wait about 5 minutes or so and then reconnect (This clears the settings) and then start up the engine. I know that when I tore into my intake manifold I had to unplug all the electrical connectors and when I reconnected it would barely even run until I cleared things. Worth a shot IMO Link to comment Share on other sites More sharing options...
D-a-n-i-e-l Posted April 1, 2013 Share Posted April 1, 2013 did you use your original sensors, or did you just assume the ones (if not a new intake) on the intake installed were good? Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now