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Old 04-05-2005, 02:10 PM   #1
94stoner
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Default Bad Fuel Injector?

94 SL2 98,000 miles. Automatic
My #1 fuel injector is intermittent? When the engine is cold it works fine, I check this by pulling out the ignition wire to that cylinder expecting the motor to stumble or not. When I start my car when the engine is hot I get no fuel to that cylinder. The only way for me to get that injector going again is to tap that injector plug on top with the end of a screwdriver. Then it works. I already tried 2 bottles/tanks of the injector cleaner but still the same problem. My question is: Is the injector just clogged? Or the coil winding is bad?
Thanks

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Old 04-05-2005, 10:10 PM   #2
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Default Re: Bad Fuel Injector?

If you are tapping the injector connector to get it working there is a chancve that the connector has a problem with a loose connection. If you believe it to be the injector for sure try swapping the injector with another cylinder to see if the problem follows the injector. If it does replace it.

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Old 04-06-2005, 10:39 AM   #3
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Default Re: Bad Fuel Injector?

Quote:
> ssicarman <
> If you are tapping the injector connector to get it working there is a chance that the connector has a problem with a loose connection <
Very Good piece of analysis -- that slipped my mind. I would have simply assumed that it was the injector

...
> 95 SL 2 = 653,369 Miles 40.4 MPG, as of 5/20/11. My manual Radiator Fan Switch, courtesy of Wolfman's patient installation guidance, continues to be.......invaluable < The car was retired

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Old 06-05-2005, 01:16 PM   #4
94stoner
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Default Re: Bad Fuel Injector?

Just an update.
I haven't did anything to my problem yet, but I found something out about gasoline. Everytime I fill up with ARCO gas 87 because it's the cheapest around here in LA I get my intermittent injector problem. But when I fill up with Mobil (87) my injector problem goes away and I do notice a little more power. Of course I shouldn't have any problems with any type of gas I use but it's strange. I still have to take care of my problem though.

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Old 06-06-2005, 08:34 AM   #5
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Default Re: Bad Fuel Injector?

Aaaaaaaaaaaahhhhhhhh, I've been using Arco (Los Angeles & Orange Counties) for decades with no problems. You may, though, be getting bad gas from one particular "old" (thus underground tank) station.

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> 95 SL 2 = 653,369 Miles 40.4 MPG, as of 5/20/11. My manual Radiator Fan Switch, courtesy of Wolfman's patient installation guidance, continues to be.......invaluable < The car was retired

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Old 06-23-2005, 07:45 PM   #6
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Default Re: Bad Fuel Injector?

Luke I think you are correct. Since my last post here I have been using other brands of gasoline (even a different ARCO) and I don't have that injector problem anymore. BUT I did go back to that ARCO about two days ago and guess what! My injector problem came back. I won't go there anymore and now I have to put up with my problem until I use up all of that gas.
Thanks.

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Old 06-23-2005, 09:04 PM   #7
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Default Re: Bad Fuel Injector?

To make sure that it's not the injector, you could try swapping number one with 2 or 3.

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Old 06-23-2005, 09:32 PM   #8
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Default Re: Bad Fuel Injector?

I woud be a little suspicious of the fuel as problem idea. If it was fuel, would you have problems with other injectors as well? Also tapping on injector wouldn't solve the problem. Still sounds like a short in the injector connection. Could be mistaken, but I would try swapping injectors just to see what happens.

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Old 06-23-2005, 11:30 PM   #9
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Default Re: Bad Fuel Injector?

Quote:
Originally Posted by dansl2
I woud be a little suspicious of the fuel as problem idea. If it was fuel, would you have problems with other injectors as well?
not nessicirally, if the injectior is partilly clogged the better gas(Mobil) may work but the lower quality fuel(ARCO) won't. its possible but i don't think that is the cause in this case. i think i'm going with ssicarman on this one.

first measure resistance of the injectior both cold and hot and compare. if you have a NOID light handy, you may want to see it you are getting a injectior signal when warm, then with the NOID light still installed wiggle the wire and connectior see if the signal changes. also you can use a mechanic's sheitiscope or a long flathead screwdriver to listen for the injectior ticking. if the injectior is ticking and you have no fuel, the injectior sounds clogged to me. also visually inspect the connectior.

one way or the other, odds are the injectior will need replaced, or there is a small chance the connectior/wiring is damaged.

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Old 06-24-2005, 09:21 AM   #10
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Default Arco Customer Relations Complaint

Arco Customer Relations Complaint telephone number is 1800 - 322 - 2726

You'll need the station location and "number"; you'll find that on your receipt.

>>>>>>>>>>>>>>>>>>

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> 95 SL 2 = 653,369 Miles 40.4 MPG, as of 5/20/11. My manual Radiator Fan Switch, courtesy of Wolfman's patient installation guidance, continues to be.......invaluable < The car was retired

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Old 06-24-2005, 03:38 PM   #11
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Default Re: Bad Fuel Injector?

a wise old Standard Oil of Ohio (now BP) engineer once told me:

switch brands of gas often
everybody cheats on the additives but everybody cheats on different ones at different times

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