Help: 1992 Chevy S10 Blazer Intermittant Start Probs

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sandi bryant - 28 May 2005 23:05 GMT

I have a '92 s10 (4.3l CPI) that sometimes will not start, acts like it's
out of gas, has fuel pressure and spark. Will then start normally and run
good after a few minutes. Sometimes on start, engine will race, and will not
stop raciing until turned off. Have replaced coil, rotor button, ig module,
cap, fuel filter, plug wires, map sensor, and fuel pump relay. Short of
pushing it off a cliff, any ideas would be greatly appreciated.

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Walter - 28 May 2005 23:36 GMT

> I have a '92 s10 (4.3l CPI) that sometimes will not start, acts like it's
> out of gas, has fuel pressure and spark. Will then start normally and run
> good after a few minutes. Sometimes on start, engine will race, and will not
> stop raciing until turned off. Have replaced coil, rotor button, ig module,
> cap, fuel filter, plug wires, map sensor, and fuel pump relay. Short of
> pushing it off a cliff, any ideas would be greatly appreciated.

Idle control motor defective and or passages diry with carbon.

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Steve Cook - 30 May 2005 13:40 GMT

Help: 1992 Chevy S10 Blazer Intermittant Start Probs

Group: alt.autos.gm Date: Sat, May 28, 2005, 6:05pm (CDT+1) From:
sandibryant@appalachiamail.com (sandi bryant)
I have a '92 s10 (4.3l CPI) that sometimes will not start, acts like
it's out of gas, has fuel pressure and spark. Will then start normally
and run good after a few minutes. Sometimes on start, engine will race,
and will not stop raciing until turned off. Have replaced coil, rotor
button, ig module, cap, fuel filter, plug wires, map sensor, and fuel
pump relay. Short of pushing it off a cliff, any ideas would be greatly
appreciated.

The racing could e your ignition switch sticking...You say it has fuel
pressure?
How much pressure does it have? Also does it hold pressure? Coud be your
pump bleeding down or you could have a bad fuel pressure
regulator.....Does it act up mainly when it sits for a long period of
time say overnight?
S Cook

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Wendy & John - 30 May 2005 21:46 GMT

sandi bryant wrote: (1992 S10 4.3L CPI Blazer Intermittent Start)

Sometimes will not start, acts like it's out of gas, has fuel pressure and
spark. Will then start normally and run good after a few minutes.
Sometimes on start, engine will race, and will not stop raciing until
turned off. Have replaced coil, rotor button, ig module, cap, fuel filter,
plug wires, map sensor, and fuel pump relay. Short of pushing it off a
cliff, any ideas would be greatly appreciated.
_________________________________________________________

Defective or sticking Idle Air Controller is a likely cause.

Things which may help without buying more parts:

Disconnect and reconnect IAC connector to clean pin corrosion.
Remove IAC, clean pintle and seat then reinstall.
Push throttle pedal to floor multiple times to clean TPI resistor.
Disconnect and reconnect TPI connector to clean pin corrosion.
Confirm good vacuum (or electrical) connection to EGR valve.
Remove EGR valve, clean pintle and seat then reinstall.

Good luck.

Wendy & John.
______________________________________________________

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Steve Cook - 31 May 2005 03:18 GMT

Re: Help: 1992 Chevy S10 Blazer Intermittant Start Probs

Group: alt.autos.gm Date: Mon, May 30, 2005, 8:46pm (CDT+5) From:
ardanswj@kilobar.net (Wendy & John)
sandi bryant wrote: (1992 S10 4.3L CPI Blazer Intermittent
Start)
Sometimes will not start, acts like it's out of gas, has fuel pressure
and spark. Will then start normally and run good after a few
minutes. Sometimes on start, engine will race, and will not stop raciing
until turned off. Have replaced coil, rotor button, ig module, cap,
fuel filter, plug wires, map sensor, and fuel pump relay. Short of
pushing it off a cliff, any ideas would be greatly appreciated.
______________________________________________
Defective or sticking Idle Air Controller is a likely cause.
Things which may help without buying more parts:
Disconnect and reconnect IAC connector to clean pin corrosion. Remove
IAC, clean pintle and seat then reinstall. Push throttle pedal to floor
multiple times to clean TPI resistor. Disconnect and reconnect TPI
connector to clean pin corrosion. Confirm good vacuum (or electrical)
connection to EGR valve. Remove EGR valve, clean pintle and seat then
reinstall.
Good luck.
Wendy & John.

Oh he said the engine racing...Whay did i say ignition switch..
Oh I didnt read it right ,,,,,Yep Wendy and Jhon have a point,,
Also does you gas peddle stick? Could need a good
cleaning______________________________________________

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