gas smell, bad idle, smoke from steering colum
- Thread starter syty9933
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midnightbluS10
Banned
Re: gas smell, bad idle, smoke from steering colum
Yes. You may want to follow that up with a leakdown test so you can actually pinpoint the problem.
Yes. You may want to follow that up with a leakdown test so you can actually pinpoint the problem.
Sean Krupa
Moderator
Re: gas smell, bad idle, smoke from steering colum
John,
I found 1 of the PCV valves on the left valve cover, but where is the other one on the right valve cover?
Thanks,
John,
I found 1 of the PCV valves on the left valve cover, but where is the other one on the right valve cover?
Thanks,
Re: gas smell, bad idle, smoke from steering colum
You have two PCV valves, one for vacuum and one for boost. Both valves are on the passenger valve cover. There is a T out of the breather hole on the passenger valve cover, the PCV valves are on this T. The rear one connects to the un-blocked port on the back of the throttle body, this is utilized under engine vacuum. The front one is plumbed into the air inlet duct (crossover tube) and is utilized under boost. The breather hole on the driver side valve cover is plumbed into the air intake system as well, and has no valve, as it is the air inlet for the system. They have to be the proper part number PCV valves, AC Delco #799C. They will have an E stamped on the bottom. I have never seen the proper valves in a parts store, Autozone, NAPA, Pep Boy's, Checker/O'Reilly, none of them had them when I needed them and the Valves listed in their parts systems were the same as standard S10/S15's and are the wrong ones. If your valves have a D, or something else stamped in they are the wrong ones. I was able to get them from GMPartsdirect.com under GM part #8995910. Hood or another vendor might have them in stock as well.
You have two PCV valves, one for vacuum and one for boost. Both valves are on the passenger valve cover. There is a T out of the breather hole on the passenger valve cover, the PCV valves are on this T. The rear one connects to the un-blocked port on the back of the throttle body, this is utilized under engine vacuum. The front one is plumbed into the air inlet duct (crossover tube) and is utilized under boost. The breather hole on the driver side valve cover is plumbed into the air intake system as well, and has no valve, as it is the air inlet for the system. They have to be the proper part number PCV valves, AC Delco #799C. They will have an E stamped on the bottom. I have never seen the proper valves in a parts store, Autozone, NAPA, Pep Boy's, Checker/O'Reilly, none of them had them when I needed them and the Valves listed in their parts systems were the same as standard S10/S15's and are the wrong ones. If your valves have a D, or something else stamped in they are the wrong ones. I was able to get them from GMPartsdirect.com under GM part #8995910. Hood or another vendor might have them in stock as well.
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Re: gas smell, bad idle, smoke from steering colum
so what exactly would a compression test tell me? if its too low it is blown? or could it be a simpler problem that makes it too low? or it was normal it means i have no problems? ans what is the best range for our trucks?
thanks
so what exactly would a compression test tell me? if its too low it is blown? or could it be a simpler problem that makes it too low? or it was normal it means i have no problems? ans what is the best range for our trucks?
thanks
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Quickstop [UK]
Combating adversyty.
Re: gas smell, bad idle, smoke from steering colum
Be careful with the comp test. It can be useful if you know how to read it.
I thought I had a blown motor but turns out my valves were badly adjusted
The comp test will tell you what compression you have on each cylinder. You should be looking for about 150-170 psi compression per cylinder. Anything less than that and you might have a problem.
It is a large range depending on how well the rings seat, any oil thicknesses etc...
if you do think you have piston slap then the rings will not be seated as well and you might show lower compression.
Best thing is to do it and post up your results here for all the cylinders to compare.
Be careful with the comp test. It can be useful if you know how to read it.
I thought I had a blown motor but turns out my valves were badly adjusted
The comp test will tell you what compression you have on each cylinder. You should be looking for about 150-170 psi compression per cylinder. Anything less than that and you might have a problem.
It is a large range depending on how well the rings seat, any oil thicknesses etc...
if you do think you have piston slap then the rings will not be seated as well and you might show lower compression.
Best thing is to do it and post up your results here for all the cylinders to compare.
thunderace31
New member
Re: gas smell, bad idle, smoke from steering colum
Leak Down test is the best way to test for bad or worn cylinders Summit and Jegs both sell nice ones just follow the directions that they come with. Some auto parts stores will also rent them to you
Its about 90% More accurate do a search on the net or Youtube and youll be able to get more info on it
:tup:
Leak Down test is the best way to test for bad or worn cylinders Summit and Jegs both sell nice ones just follow the directions that they come with.
Some auto parts stores will also rent them to you Its about 90% More accurate do a search on the net or Youtube and youll be able to get more info on it
:tup:
cheatham2492
New member
Re: gas smell, bad idle, smoke from steering colum
I pulled the oil cap on my old Chevelle and it puffed smoke when running.I broke the side off the piston land. I had that old Holly projection on it and no way to tune it and ran lean.The should have came with at least a O2 sensor.
I pulled the oil cap on my old Chevelle and it puffed smoke when running.I broke the side off the piston land. I had that old Holly projection on it and no way to tune it and ran lean.The should have came with at least a O2 sensor.