Author Topic: Idle issues  (Read 1069 times)

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  • Offline Dusty Trails
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Idle issues
« on: Mar 12, 2016, 03:24:36 PM »
 :smack: :smack: 1987 4 Runner XLT-- aka the black pearl
Hello Oh Jedi Masters...
I need some help... Having an issue with idle in neutral and while the clutch is depressed (while changing gears and while taking out of gear). At running temp, it revs up anywhere between 1500 and 3+ RPM. I have put in new throttle cable, adjusted valves, adjusted idle, and replaced TPS... Pheww... I have an 87, but my 88 that I rolled this fall was doing the same thing. It feels mechanical but I'm stuck.... Lay it on me I'm listnin... Thanks in advance.


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Re: Idle issues
« Reply #1 on: Mar 13, 2016, 03:37:48 AM »
Did you tune the TPS while the throttle body was still installed? When I replaced mine, I didn't remove the TB, and it ran like crap... I took off the TB and tuned it again, and it was off about a degree, but upon re-install of the TB, it ran perfectly.

You might also want to check for any vacuum leaks... spray a tiny bit of brake cleaner or starting fluid around the intake in small doses, and you might find an intake leak somewhere... Mine was on my IACV.

Good luck!
1993 Standard cab chassis. 1989 Extended Cab. 22R-E BO .020, ENGNBLDR 261c cam, Doug Thorley Tri-Y header, Straight Pipe through a Flowmaster 40, ARB Rear Locker, York OBA with fabricated bracket.
Projects waiting in my shop: '83 Front Axle, TG Sliders, second tcase, NEW: XD 4.70 gears!


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Re: Idle issues
« Reply #2 on: Mar 14, 2016, 10:09:30 PM »
Stupid questions, but does it still rev high when you remove the throttle cable, and have you adjusted the idle screw on the throttle body?

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