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Eric
Eric, Automotive Repair Shop Manager
Category: Chevy
Satisfied Customers: 31063
Experience:  20+ yrs. experience as repair shop manager and technician.
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I need to consult a chevy mechanic, preferably S, if not

Customer Question

I need to consult a chevy mechanic, preferably Mike S, if not available, any other
Submitted: 5 months ago.
Category: Chevy
Expert:  Eric replied 5 months ago.

Hi,

I am sorry that you have not been helped yet. I just came online and saw your question

What is the question and please include as much detail as possible, including what has been tried at this time to repair whatever the problem is

Customer: replied 5 months ago.
The problem is not fixed yet. the engine when started cold will idle at 1000 rpm with a steady manifold vavuum at 16 inches.
After 5-10 minutes it starts missing with a manifold vacuum at 5 inches. I fixed the problem of the dcl and I got the following data
readings: rpm: 700
load : 10.6
ect : 140
vacuum: 5 inches
spark advance: 2 deg
tps: 0%
fuel pump: 60 psi Note: heavily sooted plugs
shorttft: 36%
longtft: 0.8%
02S: 0.00 V