Update: 94 sBlazer cold start issue

Well,
I posted last week or so about a starting problem that i thought was a starter or possibly battery issue but does not seem the case. battery checked at autozone
Recap: If it's above say 60 degrees the car will start fine after sitting all night. If it's cooler it seems to have an extended crank time (2x @ 6seconds) before the engine finally starts. And then from there on in it starts right off the bat the rest of the day. Definately seems temperature plays a factor as saturday it was about 65 here on sat. and the truck had been sitting for a good 12 hours and it started up right away. however the next day 55 degrees and it took a few extra tries before starting. I have 1. new coil,plugs,wire,rotor,cap, air filter,pcv 2. new fuel pump relay
I hear the fuel pump prime when turning the key.Once it starts it runs great no stumbling or bad idle or anything.
? If the oil pump sender/switch is being flaky (i.e. when it's cold it's crapping out then after a couple seconds it kicks in.) will that prevent the car from starting? I know the fuel pump relay pressurizes the system but if it doesn't see a signal from the oil pressure switch, will that keep the car from starting? ? If it was losing fuel pressure wouldn't it start harder reguardless of the temp?
Stumped and looking for suggestions.
Thanks
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. . . . Update: 94 sBlazer cold start issue Group: alt.autos.4x4.chevy-trucks Date: Tue, Oct 28, 2003, 11:06am (CST-2) From: snipped-for-privacy@yahoo.com (vwtopdown)
Well, I posted last week or so about a starting problem that i thought was a starter or possibly battery issue but does not seem the case. battery checked at autozone
Recap: If it's above say 60 degrees the car will start fine after sitting all night. If it's cooler it seems to have an extended crank time (2x @ 6seconds) before the engine finally starts. And then from there on in it starts right off the bat the rest of the day.
Definately seems temperature plays a factor as saturday it was about 65 here on sat. and the truck had been sitting for a good 12 hours and it started up right away. however the next day 55 degrees and it took a few extra tries before starting.
I have 1. new coil,plugs,wire,rotor,cap, air filter,pcv
2. new fuel pump relay
I hear the fuel pump prime when turning the key.Once it starts it runs great no stumbling or bad idle or anything.
? If the oil pump sender/switch is being flaky (i.e. when it's cold it's crapping out then after a couple seconds it kicks in.) will that prevent the car from starting?
I know the fuel pump relay pressurizes the system but if it doesn't see a signal from the oil pressure switch, will that keep the car from starting?
? If it was losing fuel pressure wouldn't it start harder reguardless of the temp?
Stumped and looking for suggestions. Thanks =========I think you would be well advised to install the oil presure switch AND a temperature sensor .....if it's not a money thing.
and yes.....the symptom would be there all the time if regardless of temp if the fuel pressure was dropping consistantly.
Did you ever check the fuel pressure regulator?
pop ~:~
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On Tue, 28 Oct 2003 14:42:18 -0600 (CST), BunklesAlternativeFuels_and_Wholesale snipped-for-privacy@webtv.net (Pop Bunkle) wrote:

Symptoms are, IME, backwards for a bad FPR. The one on my 94 was leaking 2 years ago. In the AM, first start of the day, it would a fairly normal start. I'd drive to work, truck would sit for 45 mins-2 hours and it would be tough to start. After about 2 hours, it would be a relatively normal start. I replaced the FPR/injector assembly, and 2 fuel lines called a nut kit, and my problems disappeared.
I also suspect either the CTS or the OPS...
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IME ???
FPR. ???
FPR/ ???
CTS ???
OPS... ???
~KJ~
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dunno on that one..

Fuel Pressure Regulator

see above

Coolant Temperature Sensor

Oil Pressure Sender/Switch (the sender and switch may or may not be two seperate parts, depending on year)
-Bret
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<SNIP>
Thanks, always enjoy learnin....
~KJ~
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In My Experience
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snipped-for-privacy@yahoo.com (vwtopdown) wrote in message

As a follow up. A new fuel pump and filter and the truck is running perfect again.
md
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