Loosing Power When Warm

bdogg241980 · 10-25-2009, 07:29 PM

Im having an issue with this stupid blazer 4.3 vortec cpi vin w.. Its loosing power when it gets warm it drives fine when its cold if it sits in traffic for awhile it boggs down when accelerating I have to accelerate slow so it will go.. I have changed the plugs spider injector pcv valve fuel pump everything and even cut the cat off still same problem... I noticed oil in the upper plenium cleaned it out and changed pcv still getting oil there..Any help would be appreciated

BadS15v8 · 10-25-2009, 10:05 PM

Sounds like coil or ignition module. I'd take the module out of the distributor first and take it to Advance/Oriellys/AutoZone and have them test it first. Make sure they run the test at least 3 times so it'll get warm and see if it's bad.

bdogg241980 · 11-07-2009, 12:28 AM

I never thought about the ignition module and yes that was the problem changed the one and now driving much better no bogging down at all.. Still getting oil in the plenium eventully I will figure that one out so thanks for helping on this matter

trucky · 11-07-2009, 04:33 AM

Not to hijack the thread, but where exactly is the ignition module in the distributor? i am having this same problem and would like to see if this fixes my problem too. Also, which store did you take it to, to get it tested?

bdogg241980 · 11-07-2009, 08:39 PM

Quote: Originally Posted by trucky

Not to hijack the thread, but where exactly is the ignition module in the distributor? i am having this same problem and would like to see if this fixes my problem too. Also, which store did you take it to, to get it tested?

take the distributor off look at where the electrical wires are going that little black box is the module. If you are having the same problems as I said I did then that will be the issue I dont have any problems with bogging down or loss of power anymore after changing it. I went to the junk yard and got one if it didnt work then that was not my problem lol I did not take it to get it checked for me its too much of a hassle to test stuff unless it is near me.. Im sure auto zone will check it if they can im not for sure if they can or not..

BadS15v8 · 11-08-2009, 12:01 PM

Quote: Originally Posted by bdogg241980

Im having an issue with this stupid blazer 4.3 vortec cpi vin w.. Its loosing power when it gets warm it drives fine when its cold if it sits in traffic for awhile it boggs down when accelerating I have to accelerate slow so it will go.. I have changed the plugs spider injector pcv valve fuel pump everything and even cut the cat off still same problem... I noticed oil in the upper plenium cleaned it out and changed pcv still getting oil there..Any help would be appreciated

How many miles is on your truck? Oil in the plenum may be blow-by. If your truck has high mile's the oil could be sitting in the heads longer than needs (sludge build up in the drain ports) and oil's going back through the PCV or the brather tube

bdogg241980 · 11-08-2009, 10:30 PM

I got 144000 miles on it.. I noticed the oil was coming from the pcv valve from blow by i changed the pcv valve no use still getting blow by.. How can I stop it?

BadS15v8 · 11-10-2009, 01:10 PM

You mat try something like Slick-50 or some Lucas, but 9 times outta 10 if you've changed the PCV and your still getting blow-by it's time for a overhaul. Do a goole search on Engine Blow-By that'll give ya a idea of whats goin on.

10-25-2009, 07:29 PM	#1
bdogg241980 Registered User Age: 29 Join Date: May 2009 Posts: 6 Location: User is: OffLine	Loosing Power When Warm Im having an issue with this stupid blazer 4.3 vortec cpi vin w.. Its loosing power when it gets warm it drives fine when its cold if it sits in traffic for awhile it boggs down when accelerating I have to accelerate slow so it will go.. I have changed the plugs spider injector pcv valve fuel pump everything and even cut the cat off still same problem... I noticed oil in the upper plenium cleaned it out and changed pcv still getting oil there..Any help would be appreciated
	[Reply w/Quote]

10-25-2009, 10:05 PM	#2
BadS15v8 Registered User Age: 23 Join Date: Aug 2005 Posts: 1,034 Location: User is: OffLine	Re: Loosing Power When Warm Sounds like coil or ignition module. I'd take the module out of the distributor first and take it to Advance/Oriellys/AutoZone and have them test it first. Make sure they run the test at least 3 times so it'll get warm and see if it's bad.
	[Reply w/Quote]

11-07-2009, 12:28 AM	#3
bdogg241980 Registered User Age: 29 Join Date: May 2009 Posts: 6 Location: User is: OffLine	Re: Loosing Power When Warm I never thought about the ignition module and yes that was the problem changed the one and now driving much better no bogging down at all.. Still getting oil in the plenium eventully I will figure that one out so thanks for helping on this matter
	[Reply w/Quote]

11-07-2009, 04:33 AM	#4
trucky Registered User Join Date: May 2008 Posts: 252 Location: SoCal User is: OffLine	Re: Loosing Power When Warm Not to hijack the thread, but where exactly is the ignition module in the distributor? i am having this same problem and would like to see if this fixes my problem too. Also, which store did you take it to, to get it tested?
	[Reply w/Quote]

11-07-2009, 08:39 PM	#5
bdogg241980 Registered User Age: 29 Join Date: May 2009 Posts: 6 Location: User is: OffLine	Re: Loosing Power When Warm Quote: Originally Posted by trucky Not to hijack the thread, but where exactly is the ignition module in the distributor? i am having this same problem and would like to see if this fixes my problem too. Also, which store did you take it to, to get it tested? take the distributor off look at where the electrical wires are going that little black box is the module. If you are having the same problems as I said I did then that will be the issue I dont have any problems with bogging down or loss of power anymore after changing it. I went to the junk yard and got one if it didnt work then that was not my problem lol I did not take it to get it checked for me its too much of a hassle to test stuff unless it is near me.. Im sure auto zone will check it if they can im not for sure if they can or not.. Last edited by bdogg241980 : 11-07-2009 at 08:44 PM.
	[Reply w/Quote]

11-08-2009, 12:01 PM	#6
BadS15v8 Registered User Age: 23 Join Date: Aug 2005 Posts: 1,034 Location: User is: OffLine	Re: Loosing Power When Warm Quote: Originally Posted by bdogg241980 Im having an issue with this stupid blazer 4.3 vortec cpi vin w.. Its loosing power when it gets warm it drives fine when its cold if it sits in traffic for awhile it boggs down when accelerating I have to accelerate slow so it will go.. I have changed the plugs spider injector pcv valve fuel pump everything and even cut the cat off still same problem... I noticed oil in the upper plenium cleaned it out and changed pcv still getting oil there..Any help would be appreciated How many miles is on your truck? Oil in the plenum may be blow-by. If your truck has high mile's the oil could be sitting in the heads longer than needs (sludge build up in the drain ports) and oil's going back through the PCV or the brather tube
	[Reply w/Quote]

11-08-2009, 10:30 PM	#7
bdogg241980 Registered User Age: 29 Join Date: May 2009 Posts: 6 Location: User is: OffLine	Re: Loosing Power When Warm I got 144000 miles on it.. I noticed the oil was coming from the pcv valve from blow by i changed the pcv valve no use still getting blow by.. How can I stop it?
	[Reply w/Quote]

11-10-2009, 01:10 PM	#8
BadS15v8 Registered User Age: 23 Join Date: Aug 2005 Posts: 1,034 Location: User is: OffLine	Re: Loosing Power When Warm You mat try something like Slick-50 or some Lucas, but 9 times outta 10 if you've changed the PCV and your still getting blow-by it's time for a overhaul. Do a goole search on Engine Blow-By that'll give ya a idea of whats goin on.
	[Reply w/Quote]