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Old Apr 10, 2009 | 08:01 PM
  #1  
johnnycorvette43's Avatar
johnnycorvette43
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From: milton Ontario
Default Starting Issues

Hope someone can help. My car starts up in the morning easily, I turn the key, dont touch the gas peddle and it starts right up.

After driving for a period of time throughout the day I turn the key and it does not start. I press my gas peddle down all the way and it starts right up. Any ideas would be appreciated.

Also thanks to the folks that helped me with my SES issue.
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Old Apr 12, 2009 | 06:43 AM
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Paul Workman
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From: South-central Missouri
Default Could be an injector leaking

Originally Posted by johnnycorvette43
Hope someone can help. My car starts up in the morning easily, I turn the key, dont touch the gas peddle and it starts right up.

After driving for a period of time throughout the day I turn the key and it does not start. I press my gas peddle down all the way and it starts right up. Any ideas would be appreciated.

Also thanks to the folks that helped me with my SES issue.
A leaking injector will cause just that set of circumstances. Put a fuel pressure gauge on the fuel rail, turn the switch to "ON" w/o starting the engine. This should bring on the fuel pump. Then, shut the switch off and watch the fuel pressure. If it holds to within a couple pounds for 3-4 minutes, you're good. If it won't hold, then you might have an injector leaking.

Another cause is if the plugs are fouled - which could happen too, if an injector is leaking.

P.
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Old Apr 12, 2009 | 06:06 PM
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From: Spring TX
Default

Originally Posted by Paul Workman
A leaking injector will cause just that set of circumstances. Put a fuel pressure gauge on the fuel rail, turn the switch to "ON" w/o starting the engine. This should bring on the fuel pump. Then, shut the switch off and watch the fuel pressure. If it holds to within a couple pounds for 3-4 minutes, you're good. If it won't hold, then you might have an injector leaking.

Another cause is if the plugs are fouled - which could happen too, if an injector is leaking.

P.

I would also check the ohm resistance of all the injectors. Anything <10 (especially if you have a significant difference in resistance compared to the others)...needs to be replaced. I just changed out all my injectors (Bosch III - FIC Injectors) on my '89. My old injectors passed the leak-down pressure test with flying colors...2 injectors failed the ohm check.

Car runs great now!
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Old Apr 13, 2009 | 10:11 AM
  #4  
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pcolt94
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From: Orlando FL
Default

I agree with THOMAS. Low resistance is not a direct indication of a leaking injector. Regardless of the resistance, if the valve seat of the injector is bad it could leak.

What the low resistance (having shorted wire turns in the injector coil) will do is having the injector not open enough or not atomizing correcting. This leads to a poor mixture and bad running. Those years are know for defective injectors and having low and un-even resistance across the board.

If you have low resistance and don’t have a leek, I would recommend replacing them anyway. As many said it will run a lot better.
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