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Old 12-31-2011, 11:17 AM   #1
saturn95
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Default Hard time starting after sitting for a few days

Hi guys, my 2001 SL2 sat for about a week and went I went to started, it started very badly and the rpm when idling was not stable. The exhaust also had lots of smoke and it smelled like gas. This is the second time happening. Once I run it for a minute or two, I can start it with no problems. The car runs great and has no codes.

Could this be an injector leaking and flooding the engine? If so, is there a way to test them before replacement them given that they cost 100 a piece?

Is there something else I should check?

Thanks in advance and happy new year!!!

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Old 12-31-2011, 12:20 PM   #2
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2001 SL2
Default Re: Hard time starting after sitting for a few days

it sounds like a leaking/clogged injecter..if you call your local gm dealer parts dept they should be able to give you the # for a bussness who cleans and flow tests injecters.. out here in seattle we use a place called"docter injecter"might be a franchise don;t know.. however be advised that older injecters that are cleaned like alot of the older ones like in the lt1v8 engines tend to fail with in a year or so...so you might just have them flow tested and if they are restricted just replace and not clean...














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Old 01-04-2012, 08:50 PM   #3
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Default Re: Hard time starting after sitting for a few days

Thanks for the reply!

Is this the only way to test the injectors? Does anyone know whether they can be tested by measuring their resistance or something like that?

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Old 01-04-2012, 09:19 PM   #4
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Default Re: Hard time starting after sitting for a few days

change the coolant temp sensor, usally the problem of rich start medium temp or cold

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Old 01-04-2012, 09:35 PM   #5
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Default Re: Hard time starting after sitting for a few days

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Originally Posted by firstar View Post
change the coolant temp sensor, usally the problem of rich start medium temp or cold
Good point, but I did change it about 8 months ago and I did it with the tip you guys recommended (I cannot remember which one it was). Can it still be that? Thanks.

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Old 01-05-2012, 05:29 AM   #6
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Default Re: Hard time starting after sitting for a few days

It's probably not "that" again, but could be corroded connector to it, which is moderately common. If so, solder the wires together with a new connector.

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Old 01-05-2012, 09:30 AM   #7
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Default Re: Hard time starting after sitting for a few days

If anyone suspects any injector of leaking (not likely) then the easiest test, short of removing the fuel rail and injectors to lay out exposed while turning on the ignition, is with a fuel pressure gauge. Keep in mind several components when using a pressure gauge; the injectors, pressure regulator, pump check valve, etc.. Using a fuel pressure gauge can help eliminate doubts about the fuel system.

A fuel pressure gauge attached to the fuel rail's test valve will show immediate pressure as soon as the ignition switch is turned ON. The pump runs for 2-seconds than shuts off (for safety) unless the engine is started. Pressure should remain steady for at least 5-minutes and not bleed off. Holding pressure means; the pump check valve works, no lines are leaking, none of the injectors are leaking, and the pressure regulator isn't leaking. All by simply using a fuel pressure gauge.

Only '97's have a faulty pump check valve that bleeds off fuel pressure as soon as the 2-second time out occurs.

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Old 01-06-2012, 11:22 AM   #8
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Default Re: Hard time starting after sitting for a few days

Thanks guys, I will check the connector for corrosion and I will test the fuel delivery system with a gauge like you suggested.

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Old 01-06-2012, 11:37 AM   #9
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Default Re: Hard time starting after sitting for a few days

Quote:
Originally Posted by fdryer View Post
If anyone suspects any injector of leaking (not likely) then the easiest test, short of removing the fuel rail and injectors to lay out exposed while turning on the ignition, is with a fuel pressure gauge. Keep in mind several components when using a pressure gauge; the injectors, pressure regulator, pump check valve, etc.. Using a fuel pressure gauge can help eliminate doubts about the fuel system.

A fuel pressure gauge attached to the fuel rail's test valve will show immediate pressure as soon as the ignition switch is turned ON. The pump runs for 2-seconds than shuts off (for safety) unless the engine is started. Pressure should remain steady for at least 5-minutes and not bleed off. Holding pressure means; the pump check valve works, no lines are leaking, none of the injectors are leaking, and the pressure regulator isn't leaking. All by simply using a fuel pressure gauge.

Only '97's have a faulty pump check valve that bleeds off fuel pressure as soon as the 2-second time out occurs.
Do that. You can virtually rule out injectors and the rest of the fuel system by performing a pressure test. Many if not all autozones have a fuel pressure tester available as a loaner tool (it comes in a kit with a multimeter). Apparently they're not used very often, though, because the two times I went to borrow one (two different stores), they had no idea it existed and wanted to give me a compression tester instead (finally someone was able to find the right thing, after I insisted that they had it).

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