1993 Oldsmobile Bravada No Start

1993 OLDSMOBILE
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OUTLAW1
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I drove it home and it ran fine, next morning won't start. I thought maybe the gas was froze so i put it in a heated garage, that wasn't it. I checked the timing, changed the fuel filter and fuel pump, still nothing. i have spark though the wires and fuel pressure. It cranks and pops a little but won't take off. Please help.
Jan 23, 2007 at 1:21 PM
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RASMATAZ
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While cranking it -do you smell a lot of gas fumes all over
Jan 25, 2007 at 9:21 PM
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LOSTINMARS
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when you say fuel pressure, how much? the cpi 4.3 vortec system needs 58-62 psi to start, anything less than 58 and it will not start, period.
Jan 26, 2007 at 9:45 PM
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RASMATAZ
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Hi LIM, You're right on the money on the fuel pressure-Gas fumes problem: can be underneath the IMTV-Spyder unit.

By any chance do you know where the CTS on this model.

TIA
Jan 26, 2007 at 10:13 PM
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OUTLAW1
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i replaced the spider unit last august. since the last time i posted ive ran it on the obd computer. it came up code 43 which is electronic spark conterol failure. i've replaced the spark control moduel and the knock sensor. still getting nothing. it smells like gas if i've been trying to start it for a while, but not any other time. ive found the spot where you check the fuel pressure and just used a screw driver to push the little thing in and fuel shoots up, i can also hear the brand new pump coming on. i'm running completely out of ideas.
Jan 27, 2007 at 5:59 AM
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OUTLAW1
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also it wasn't acting anything like it did when the sipder went out before all this happened.
Jan 27, 2007 at 6:02 AM
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RASMATAZ
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[quote:715eb24acf="outlaw1"]i replaced the spider unit last august. since the last time i posted ive ran it on the obd computer. it came up code 43 which is electronic spark conterol failure. i've replaced the spark control moduel and the knock sensor. still getting nothing. it smells like gas if i've been trying to start it for a while, but not any other time. ive found the spot where you check the fuel pressure and just used a screw driver to push the little thing in and fuel shoots up, i can also hear the brand new pump coming on. i'm running completely out of ideas.[/quote:715eb24acf]

You need to stick a fuel pressure gauge on it-the pressure is very critical here. Get that taken care of ,then we'll go somewhere else
Jan 27, 2007 at 9:01 AM

Suggested Repair

Install a fuel pressure gauge and confirm 58-62 psi on the CPI 4.3 Vortec system before further diagnosis. Depressing the test port only shows that fuel is present, not that pressure is adequate.

Conversation Summary

A 1993 Oldsmobile Bravada Vortec V6 ran fine, then would not start the next morning. It cranks and pops slightly, has spark, and fuel comes from the test port, but it will not run. The fuel filter, fuel pump, spider unit, spark control module, and knock sensor were replaced, and code 43 for electronic spark control remained. Experts said the CPI system needs 58-62 psi and advised measuring fuel pressure with a gauge before continuing diagnosis.

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