Quoted:
Quoted:
These motors are very sensitive to ignition parts. Cheap aftermarket parts are a real problem, so only use GM parts. Rockauto has cheap GM parts and so does amazon.
Check the fuel pressure readings. you can rent a gauge or they are fairly cheap. And you spider could be bad. The poppet valves stick and leak.
Crank sensor?
Go
here and ask you question. There are some really knowledgeable GM mechanics there.
Not to start a pissing match but you are not correct.... The factory "tin" and is just that dissy cap is junk, or as per the faulty vents (for moisture) in the factory dissy. Brass aka aftermarket is a cheaper fix for this problem. Two problem occur with this ignition setup either first the dissy condenses moisture and fouls the electrodes in the cap or second due to a outsourcing if the drive gear the dissy drive gear wears prematurely due the brinell (sp?) hardness vs the cam. Thus excessive lash on the dissy usually will throw a cam correlation error via the PCM. Next poppet valves cannot stick or leak they just build up shit, or break and are to be blunt junk.
OP go get a cap with brass electrodes from any auto jobber and make a PCR (planned component replacement) on a MPFI update along with a intake gasket update. I've got a very detailed write up on these POS trucks and the TSB's and PCR's I can send you. Yeah they are junk but I own a few and worked on hundreds..... All in all good rigs just have some bugs....LOL
That's fine, but you are the first person I have ever had type that, also my experience has told me different with aftermarket parts.
As to the poppets
CBS News
The poppet valves on the CPI system have a tendency to stick open. If this occurs, a large amount of fuel will enter the combustion chamber.
From CARB:
The defective fuel injection systems cause GM owners to experience a "Service Engine Soon" light, misfires, rough idle, and hard start problems due to deposit build-up that cause poppet valves to stick and fail.
From GM
Document ID# 1234172
Subject: Rough Idle After Start, And/Or A Service Engine Soon (SES) Light (Unstick And Clean Central Sequential Fuel Injection (CSFI) Poppet Valves or Convert to MFI) #00-06-04-003B - (01/30/2003)
Models: 1995-2002 Chevrolet and GMC S/T Models
1996-2002 Chevrolet and GMC C/K, M/L, G, P Models
1996-2001 Oldsmobile Bravada
1999-2000 Cadillac Escalade
with 4.3L, 5.0L or 5.7L Engine (VINs W, X, M, R –– RPOs L35, LF6, L30, L31)
Except 2002 VIN X –– RPO LU3 Models
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This bulletin is being revised to update the Correction and Warranty Information. Please discard Corporate Bulletin Number 00-06-04-003A (Section 06 –– Engine).
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Condition
Some customers may comment on rough idle after start-up, especially if the vehicle has sat overnight. These symptoms may be intermittent. The Service Engine Soon (SES) light may also be illuminated. Current misfire or history misfire codes may be detected with the Tech 2 scan tool.
Cause
A deposit build-up on the CSFI poppet valve ball and/or seat may cause the poppet ball to stick open or closed. In either case, the specific cylinder will be mis-fueled, resulting in a cylinder mis-fire condition.
Correction
A new injector unsticking and cleaning process has proven to be effective in restoring poppet valves to an "as new" condition. CSFI injector replacement should NOT be considered as a correction for this customer concern.