IHADAV8.com - Turbo Buick Tech, and Nonsense

Tech Area => General Buick Tech => Topic started by: gordyzx9r on April 05 2011, 09:11:39 PM

Title: Friends T Won't Stay Running
Post by: gordyzx9r on April 05 2011, 09:11:39 PM

My friend's T is having issues, it wants to stall.  It was running fine, then suddenly it wanted to die...he had to ride the brakes at stops to keep it running and limp it home.

He as able to idle it for a few minutes today:

AF 04
L8 23
Btry 14.1
INT 129
BLM 130
MPH 0
CLT 121
ATS 65
RPM 675
TPS .42
IAC 175
CC 200
MAL 0
AF 05

Idle air control valve?

Title: Friends T Won't Stay Running
Post by: SuperSix on April 05 2011, 09:45:09 PM

Massive vacuum leak?

Title: Friends T Won't Stay Running
Post by: Steve Wood on April 05 2011, 09:49:34 PM

if he keeps it running until it warms up to 160 degs, do the iacs come down to normal?


That is the odd ball looking number at the moment.

Title: Friends T Won't Stay Running
Post by: gordyzx9r on April 06 2011, 08:35:48 AM

Quote from: "SuperSix @ Tue Apr 05, 2011 8:45 pm"

Massive vacuum leak?

He said he checked them all, but we'll take another look this weekend when we get a chance.

Title: Re: Friends T Won't Stay Running
Post by: chrisgarrett on April 06 2011, 09:55:49 AM

Try cleaning out the IAC with carb cleaner and a Q-tip.  Worked for me.

Title: Re: Friends T Won't Stay Running
Post by: SuperSix on April 06 2011, 10:09:07 AM

Quote from: "chrisgarrett @ Wed Apr 06, 2011 8:55 am"

Try cleaning out the IAC with carb cleaner and a Q-tip.

Title: Friends T Won't Stay Running
Post by: phil_long on April 06 2011, 10:42:31 AM

Really really bad gas???

Title: Friends T Won't Stay Running
Post by: SuperSix on April 06 2011, 10:50:05 AM

Quote from: "phil_long @ Wed Apr 06, 2011 9:42 am"

Really really bad gas???

That would have to be REALLY bad gas. Like one step up from diesel  :phpbbt;

Title: Re: Friends T Won't Stay Running
Post by: Steve Wood on April 06 2011, 10:59:51 AM

Quote from: "SuperSix @ Wed Apr 06, 2011 8:09 am"

Quote from: "chrisgarrett @ Wed Apr 06, 2011 8:55 am"

Try cleaning out the IAC with carb cleaner and a Q-tip.

Title: Re: Friends T Won't Stay Running
Post by: gordyzx9r on April 06 2011, 04:08:31 PM

Quote from: "Steve Wood @ Wed Apr 06, 2011 9:59 am"

Quote from: "SuperSix @ Wed Apr 06, 2011 8:09 am"

Quote from: "chrisgarrett @ Wed Apr 06, 2011 8:55 am"

Try cleaning out the IAC with carb cleaner and a Q-tip.

Title: Friends T Won't Stay Running
Post by: Steve Wood on April 06 2011, 04:22:23 PM

the iac is a pulse driven solenoid so yes, the iac

You unscrew the old one and screw the new one in...be sure to only snug it down as I have seen people crack the plastic housing by leaning on the wrench

Title: Friends T Won't Stay Running
Post by: SuperSix on April 06 2011, 04:32:00 PM

Probably one of the easiest repairs you can make.

Title: Re: Friends T Won't Stay Running
Post by: gordyzx9r on April 06 2011, 05:11:28 PM

Are they still available from GM?  How much do they go for?

Title: Friends T Won't Stay Running
Post by: Steve Wood on April 06 2011, 05:53:58 PM

http://www.nos4gn.com/servlet/the-92/1986-1987-Buick-Grand/Detail

have not checked aftermarket units

Title: Friends T Won't Stay Running
Post by: SuperSix on April 06 2011, 07:09:03 PM

That's a fair price for ACDelco,I think Rock Auto was at 53.95

Title: Friends T Won't Stay Running
Post by: gordyzx9r on April 06 2011, 07:14:14 PM

Quote from: "Steve Wood @ Wed Apr 06, 2011 4:53 pm"

http://www.nos4gn.com/servlet/the-92/1986-1987-Buick-Grand/Detail

have not checked aftermarket units

Thanks, I have two NIB in my parts stock...he'll just have to buy me a new one :)

Title: Re: Friends T Won't Stay Running
Post by: gordyzx9r on April 10 2011, 10:00:43 AM

Did the IAC reset and TPS adjustment and all is well.

He has a bit different setup than stock, on the bottom of the TB is an adapter plate that turns the IAC out about 45 degrees.  On my car the adjustment screw has a plunger tip on the end, his just had threads the entire length.

Title: Friends T Won't Stay Running
Post by: SuperSix on April 10 2011, 10:27:46 AM

The IAC adjustment fixed it? Cool!

Title: Friends T Won't Stay Running
Post by: Steve Wood on April 10 2011, 12:10:44 PM

I have the offset adapters too.  gives more clearance

Title: Friends T Won't Stay Running
Post by: gordyzx9r on April 10 2011, 05:33:11 PM

Quote from: "Steve Wood @ Sun Apr 10, 2011 11:10 am"

I have the offset adapters too.

Title: Friends T Won't Stay Running
Post by: Steve Wood on April 10 2011, 06:09:41 PM

put a four inch turbo inlet pipe on it...gets closer quickly :)