TPI HELP

[John Hess]

Actually, a better idea is to remove the throttle body and soak it in 
carburetor cleaner.  If you have a MAF, the procedure mentioned by mr 
Dailey becomes impractical.  The first time you restart the vehicle 
after cleaning the throttle body/plenum, I recommend you do so with 
the MAF out of the system, as the engine is prone to backfire at this 
juncture, which could damage the MAF.  Don't worry about the error 
codes until everything is hooked up after having started the engine 
and cleared the intake.




----------
From:  George M. Dailey[SMTP:gmd at tecinfo.com]
Sent:  Thursday, February 27, 1997 7:35 PM
To:  diy_efi at coulomb.eng.ohio-state.edu
Subject:  Re: TPI HELP

Peter jogged my memory. The dry manifold design of the TPI has a 
tendecy to
form carbon on and around the throttle body air valve. Grab an old 
pair of
underwear soaked with carb cleaner, wrapped around your finger, and 
'goose'
the TB. This will remove some of the carbon build up. Try this before
fooling with the sensors.  Carb cleaner can be sprayed in the IAC 
valve
inlet port (with motor running) to clean it.

Keep hope alive!
GMD

At 08:28 AM 2/26/97 -0800, you wrote:
>Hi Vance
>
>If you mounted a fuel pressure guage on the cowel and it read 40 psi
>when braking hard I guess you could rule out fuel pump or pickup
>probs. Otherwise check those out. A fuel pump putting out a static
>40 psi often fails otherwise.
>
>Check the IAC passages and throttle passages for carbon buildup.
>Your iac count should be around 10 to 40 at hot idle.
>If it is high suspect carbon buildup.
>In a pinch crank up the idle speed to 800 or so with the min air.
>This will set the iac count to zero but it should run better
>
>Also check your fuel filter. Also check pump delievery by noting
>the volume delievered by the bypass line.
>
>Dats about all I can dream up Vance.
>
>GL:peter
>
>
>