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tpi witha high idleformerv6 10-01-2002, 09:11 PM the motor is in my daily driver ( an 87 s-15 gmc jimmy) it is a 87 tpi 350 that came from an iroc, when i start the engine it idles at 1000 rpm after a few min. it slows to 450-750(hunting) then goes back up to 1000, it also seems to miss at times. i have installed new plugs, wires, cap and rotor any other suggestions Kevin91Z 10-02-2002, 01:31 AM Check for vacuum leaks, and clean the IAC motor and throttle body. aklim 10-02-2002, 02:22 AM Hook up a scan tool and see what you get for Idle Air Counts. Should be around 20 - 30. If you get 0, you turn the screw for adjustment anticlockwise till you get the reading you want. formerv6 10-02-2002, 06:50 PM Originally posted by aklim Hook up a scan tool and see what you get for Idle Air Counts. Should be around 20 - 30. If you get 0, you turn the screw for adjustment anticlockwise till you get the reading you want. to do that i need to find the 3rd 8th and 10th digits of the vin number of an 87 iroc 350 tpi. Can anyone give me the numbers? aklim 10-02-2002, 11:43 PM Try this 1 8 J. The only problem is that according to Chilton, 87 did not come with a 350 TPI. The number I gave you was for an 88. J is 88 and H is 87. 8 is 8th digit which tells it that this is for a L98 and the first digit is 1 which stands for Chevy formerv6 10-03-2002, 06:28 PM thanks i will try that on saturday and let you know how it works. | ||