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Old 07-18-2009, 03:14 PM   #1
foo
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1997 SL1
Default Changed plugs to NGK V BKR4E-11 and wires to AC Delco : Car won't start

I made the attempt to replace the spark plugs in my '97 SL1 SOHC. I put in the NGK V BKR4E-11. I tried putting in the plugs hand tight then turning 1/4 turn but there is a large sparking sound and the car dies after it tries to start up. So I was thinking that maybe the plugs are not in tight enough. I got a torque wrench and tried to tighten them to 20ft/lbs but the dang torque wrench doesn't appear to work properly. Even though it's new I think it's just a cheap piece of junk...
Anyways after doing that and only getting the plugs tight enough without really leaning into them since the torque wrench doesn't appear to work properly. The car starts for a few seconds and vibrates and shakes then dies.
It appears something has changed a little but it's not quite right. I did label the new wires and positioned them as the previous wires had been.
I was hoping to do this right and be done with it but alas I am now left with a car that won't start. Everything was working before the tune-up attempt.
I am thinking about taking out the NGK's and putting back in the AC-Delco spark plugs I had in there previously.
I am guessing it has to do with how far I am tightening the spark plugs. Any suggestions?

Thanks in advance.

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Old 07-18-2009, 03:41 PM   #2
quantumech
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Default Re: Changed plugs to NGK V BKR4E-11 and wires to AC Delco : Car won't start

For the plugs, it's hand tight, plus 1/2-2/3 turn. But really, go hand tight, then go with the wrench until the resistance becomes greater. At that point you've compressed the gasket on the plug to where it should be. Is your wrench a clicker or beam type?

Even if they aren't in there to the "correct" torque (I say it with quotes because there is a relatively wide acceptable range), it should still fire. Plugs are forgiving that way. It sounds to me like a wire is out of place. On the engine, they run from passenger to driver as 1,2,3,4. On the coil, they run from passenger to driver as 4,1,2,3. I'ld double check your order before pulling the new plugs.

You could also have the gap wrong. They should be gapped to 0.04". Did you replace the wires with new ones as well?

...
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Old 07-18-2009, 04:05 PM   #3
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Default Re: Changed plugs to NGK V BKR4E-11 and wires to AC Delco : Car won't start

o crud, i thought it was suppose to be .4 that's how they came too. I will double check the book and see if it's .4 or .04

EDIT: I checked the book and it does say .04
I checked the firing order in the book and it says it should be 1-3-4-2.
I am going to go check how I have them labeled and compare what it was to what you and the book state.

Last edited by foo; 07-18-2009 at 04:16 PM..

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Old 07-18-2009, 05:45 PM   #4
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Default Re: Changed plugs to NGK V BKR4E-11 and wires to AC Delco : Car won't start

Quote:
Originally Posted by quantumech View Post
For the plugs, it's hand tight, plus 1/2-2/3 turn. But really, go hand tight, then go with the wrench until the resistance becomes greater. At that point you've compressed the gasket on the plug to where it should be. Is your wrench a clicker or beam type?

Even if they aren't in there to the "correct" torque (I say it with quotes because there is a relatively wide acceptable range), it should still fire. Plugs are forgiving that way. It sounds to me like a wire is out of place. On the engine, they run from passenger to driver as 1,2,3,4. On the coil, they run from passenger to driver as 4,1,2,3. I'ld double check your order before pulling the new plugs.

You could also have the gap wrong. They should be gapped to 0.04". Did you replace the wires with new ones as well?
Your firing order is correct. Everything is peachy now. Thank you so much for the correction.

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