: Startup Issues



maiahsdad
04-08-13, 07:39 AM
About 90% of the time, when I start my car in the mornings before heading to work, it will run for a bout 15 seconds, and then shut down. When I restart it, I have to hold my foot on the gas because it's idling so rough that it won't continue to run. Then after about 15 seconds of that, it will smooth right out and run like butter. And will remain perfect until I shut it off for an extended amount of time.

BaTu
04-08-13, 10:50 AM
Take a look at the intake bolts, they often loosen and cause a lean condition (or you may have another vacuum leak elsewhere). Too Lean shows-up first during cold (extra rich) start & run conditions like you're describing...

EChas3
04-08-13, 09:02 PM
If you get a Check Engine light, reading that would be the obvious first step. but if not, the loose bolts mentioned above often don't set a code.

maiahsdad
04-08-13, 09:36 PM
If you get a Check Engine light, reading that would be the obvious first step. but if not, the loose bolts mentioned above often don't set a code.

A local mechanics shop said that the car had nine codes. He said that some codes cause other codes. Something about air. He says now I need to go to a dealer.

orange57
04-08-13, 09:40 PM
If you have the Northstar, I second the recommendation to check the intake manifold bolts. Or, check the vacuum line that goes from the back of the intake manifold to the brake booster. I had mine come loose once, and the car idled terribly. Although in my case the tube had come off and was fixed once I put it back on.

maiahsdad
04-08-13, 11:46 PM
If you have the Northstar, I second the recommendation to check the intake manifold bolts. Or, check the vacuum line that goes from the back of the intake manifold to the brake booster. I had mine come loose once, and the car idled terribly. Although in my case the tube had come off and was fixed once I put it back on.

I have the Northstar. After pulling the codes, it seems that nine triggered. But the technician indicated that sometimes some codes will trigger other codes.

But there was indication of air problems. And they suggest I go to the dealer for that.

curtc
04-08-13, 11:56 PM
Why take it to the dealer just yet?

What were the codes?

orange57
04-09-13, 01:13 AM
I have the Northstar. After pulling the codes, it seems that nine triggered. But the technician indicated that sometimes some codes will trigger other codes.

But there was indication of air problems. And they suggest I go to the dealer for that.

Ok, but before you go check the intake bolts. It is very easy to do. There are 10 to 12 going around the manifold. If any are loose, tighten them and then remove the negative from the battery to try and clear the codes. As we have been saying, loose intake bolts can cause a lot of codes. And if the first shop that looked at it wasn't knowledgeable on the STS they could easily over look it. It just may save you a trip to the dealer and a few hundred dollars.

maiahsdad
04-09-13, 05:14 AM
Ok, but before you go check the intake bolts. It is very easy to do. There are 10 to 12 going around the manifold. If any are loose, tighten them and then remove the negative from the battery to try and clear the codes. As we have been saying, loose intake bolts can cause a lot of codes. And if the first shop that looked at it wasn't knowledgeable on the STS they could easily over look it. It just may save you a trip to the dealer and a few hundred dollars.

Are these intake bolts easy to get to? I don't own any tools here in Indiana. I would need to go and purchase what I need. Does anyone have any diagrams to show me what to do, and what to torque the bolts at?

1BadCadSTS
04-09-13, 11:52 AM
Basic hand tools especially in 1/4 will prove beneficial.

dkozloski
04-09-13, 03:25 PM
A 1/4" drive ratcheting torque wrench, a 6" extension, a universal joint socket that fits the bolts, and a combination wrench are all I needed. If you take off the oil filler and power steering caps and yank off the beauty cover it's all in front of you.

EChas3
04-09-13, 09:24 PM
Be careful not to over tighten. The proper torque is very light. Somebody got it handy? 12 in/pds?

orange57
04-10-13, 12:18 AM
89 in-lbs for the manifold bolts.

maiahsdad
04-10-13, 08:03 AM
89 in-lbs for the manifold bolts.

So we're saying to torque the bolts to 89 pounds? Not sure what the "in" represents.

Ludacrisvp
04-10-13, 08:17 AM
that would be 'inch pounds' as opposed to the normal foot pounds.
I believe people refer to this as just a bit tighter than finger tight.
Keep in mind that the intake is plastic and over tightening will be an issue.

MoistCabbage
04-10-13, 09:49 AM
So we're saying to torque the bolts to 89 pounds? Not sure what the "in" represents.1 FT-LB is the torque applied to a fastener if you were to use a 1 foot long wrench, and apply 1 pound of force to the end of it. For IN-LBS, same thing, but with a 1 inch wrench.

EChas3
04-10-13, 09:39 PM
So finger-tight might be enough. Do not exceed 7.5 ft/lbs.

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Geometrically, this may not be perfect, but the logic is sound.