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-   -   High searching Idle (http://zr1.net/forum/showthread.php?t=28780)

jss06c6 02-10-2018 11:37 AM
Re: High searching Idle
 
Quote:
Originally Posted by Ccmano (Post 274280)
At the risk of stating the obvious. You checked both MAP sensors, right?
H
:cheers:
?? Hose under the ECM ?

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Ccmano 02-10-2018 12:26 PM
Re: High searching Idle
 
Quote:
Originally Posted by jss06c6 (Post 274285)
?? Hose under the ECM ?

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Yes, the other map sensor is under the ecm on the 90-92
H

jss06c6 02-10-2018 12:28 PM
Re: High searching Idle
 
Looked at it Hans. No issues. I'll recheck to make sure hose is good.

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mike100 02-10-2018 12:52 PM
Re: High searching Idle
 
well, since you have eliminated the outside hose connections, it sure sounds like the hard plastic curly-q under plenum hose has popped off. It goes to the gas tank purge solenoid. The leak is big enough to idle at 1200 rpm as you described. My car came like that and was the reason for my first plenum pull.

jss06c6 02-10-2018 12:57 PM
Re: High searching Idle
 
Quote:
Originally Posted by mike100 (Post 274290)
well, since you have eliminated the outside hose connections, it sure sounds like the hard plastic curly-q under plenum hose has popped off. It goes to the gas tank purge solenoid. The leak is big enough to idle at 1200 rpm as you described. My car came like that and was the reason for my first plenum pull.
That's my guess too after reading Marc's summary of known offenders! Will know this afternoon when I get under there with my borescope..

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jss06c6 02-10-2018 01:39 PM
Re: High searching Idle
 
Found it.. unfortunately. Borescope clearly shows the hose on the curved pipe under the TPS going to the gas tank purge solenoid is off. Backfire must have blown it off. Will put hose clamps on these hoses when im in there this time.. happy I found it and glad it's not the TB. Well, needed to pull plenum and IH's to Port them anyway!

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XfireZ51 02-10-2018 02:03 PM
Re: High searching Idle
 
Quote:
Originally Posted by jss06c6 (Post 274292)
... happy I found it and glad it's not the TB. Well, needed to pull plenum and IH's to Port them anyway!
The Lord works in mysterious ways.

Ccmano 02-10-2018 02:07 PM
Re: High searching Idle
 
Glad you found it, Had to be something related to the backfire. Unlikely the throttle body would go that suddenly.
H
:cheers:

jss06c6 02-10-2018 05:00 PM
Re: High searching Idle
 
Quote:
Originally Posted by XfireZ51 (Post 274293)
The Lord works in mysterious ways.
Indeed!

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jss06c6 02-10-2018 05:01 PM
Re: High searching Idle
 
Quote:
Originally Posted by Ccmano (Post 274294)
Glad you found it, Had to be something related to the backfire. Unlikely the throttle body would go that suddenly.
H
:cheers:
More labor, but easier fix!!

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