[Shotimes] my 92 SHO still hesitates off idle - HELP!

[Shylo McKinsey]

Plug Wires...

Shylo McKinsey

'91 White MTX

--- robert weinberg <centaurus3200@yahoo.com> wrote:

> hi all,
> 
> haven't been here for a while.
> 
> ran the codes - 122 and 157. maf is pro m 80mm. they
> always throw this code. tried a stock maf. still
> stutters.
> 
> code 157. tps. tried one from a working SHO. no
> luck.
> BUT, just to be sure. my friend measured the voltage
> on the connector. 5 volts. right b/t the allowed 4-6
> volt range. .9 volts with the TB closed. right where
> it should be. totally linear when opening the TB. no
> dips.
> 
> could it be the "spinny thingy" on the throttle body
> itself which the tps connects to? like my lingo? ;-)
> 
> just in case it was the cam sensor. started the car
> and disconnected it. still stumbles. put and new
> vaccum hose to the throttle body. the original one
> was trashed. no luck. measured 17 psi on the intake.
> normal seems to be 20 psi, right?
> 
> looked for obvious vacuum leaks. don't think we
> checked the hose a baysho member was talking about.
> "a
> little hose behind the intake manifold  (right
> behind
> the ford emblem) between the intake manifold and the
> firewall."
> 
> is that egr related? if so, i don't have egr.
> 
> so, what's left? seems to be getting worse. once the
> car is above 3k it's still take off like a rocket.
> 
> to recap - changed the coil pack, DIS, new plugs, my
> old wires from last 60k (all i had), tried stock
> maf,
> tried another tps, changed vacuum line to TB,
> disconnected cam sensor (temporarily).
> 
> truth be told, i'm using bosch gapable platinum
> plugs.
> not the best for the SHO, BUT i had another set on
> the
> car for 30k. worked fine, dynoed 211 to the front
> wheels with them. the plugs did look a little on the
> lean side. i know the pro flow maf runs lean. i will
> fix that with an lpm on the dyno, but first i'd like
> to get the car running smooth again.
> 
> see ya,
> Robby
> 
> 
> 		
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