Spiiting, sputtering, code 44.

vetkaw63 · 11-06-2009, 06:34 PM

Hi,
My 87 s10 Blazer is spittering and sputtering. When sitting and idleing the rpms vary slightly. Under part throttle, it spits and sputters a lot. Under full throttle it seems to run ok.
Do you think the o2 sensor could cause this or do I have a massive vacuum leak?
Any places to look?
Thanks,
Mike

vetkaw63 · 11-07-2009, 08:32 PM

Anybody??

bobditts · 11-07-2009, 08:43 PM

what is the code in the book?

vetkaw63 · 11-08-2009, 12:32 AM

Haynes manual says a lean condition exists. Check for loose connections at the computer, check for vacuum leaks, replace O2 sensor. I just don't think a lean condition alone, could make the engine spit and pop. Am I wrong?

bobditts · 11-08-2009, 01:19 AM

I have no idea. I would check all the basics if you havent already. PCV valve, fuel pressure, observe the injector spray, fuel filter, etc...

vetkaw63 · 11-08-2009, 06:45 PM

I got it, every bolt , nut on the intake manifold was loose. I tightened them up and it runs great. I have driven it for a couple hours and it has only spit once at pull off 3 or 4 times. I am afraid that it damaged the intake gasket being loose for so long. Oh well, at least I know what it is now. It runs better than it has in years. Of course I also changed the timing chain, Dissy cap and rotor, pcv, and gas cap.
Thanks Guys

neo71665 · 11-08-2009, 07:34 PM

let me get this right, every bolt on the intake was loose? I bet that thing was dumping oil out of the engine as fast you could pour it in.

vetkaw63 · 11-09-2009, 03:29 AM

Neo,
I could not see any oil leaking from the manifold. The engine leaks very little oil compared to how old that it is. The engine is copletely covered with a layer of grime, oil. There is thick oil residue in the valley between the valve cover and intake. I had assumed that it was coming from the valve covers.
I was thinking more of an internal vacuum leak? I don't know. It runs better than I ever remember it running.
Torque settings for the intake are 23 lb. ft. I'm guessing the all were at about 10 lb. ft.. When I first checked with a 3/8 drive ratchet they all turned easily. I broke out my torque wrench at that point.
I'm very happy with how it is running.

11-06-2009, 06:34 PM	#1
vetkaw63 Registered User Join Date: Aug 2008 Posts: 24 Location: User is: OffLine	Spiiting, sputtering, code 44. Hi, My 87 s10 Blazer is spittering and sputtering. When sitting and idleing the rpms vary slightly. Under part throttle, it spits and sputters a lot. Under full throttle it seems to run ok. Do you think the o2 sensor could cause this or do I have a massive vacuum leak? Any places to look? Thanks, Mike
	[Reply w/Quote]

11-07-2009, 08:32 PM	#2
vetkaw63 Registered User Join Date: Aug 2008 Posts: 24 Location: User is: OffLine	Re: Spiiting, sputtering, code 44. Anybody??
	[Reply w/Quote]

11-07-2009, 08:43 PM	#3
bobditts banned Age: 25 Join Date: Aug 2008 Posts: 947 Location: User is: OffLine	Re: Spiiting, sputtering, code 44. what is the code in the book?
	[Reply w/Quote]

11-08-2009, 12:32 AM	#4
vetkaw63 Registered User Join Date: Aug 2008 Posts: 24 Location: User is: OffLine	Re: Spiiting, sputtering, code 44. Haynes manual says a lean condition exists. Check for loose connections at the computer, check for vacuum leaks, replace O2 sensor. I just don't think a lean condition alone, could make the engine spit and pop. Am I wrong?
	[Reply w/Quote]

11-08-2009, 01:19 AM	#5
bobditts banned Age: 25 Join Date: Aug 2008 Posts: 947 Location: User is: OffLine	Re: Spiiting, sputtering, code 44. I have no idea. I would check all the basics if you havent already. PCV valve, fuel pressure, observe the injector spray, fuel filter, etc...
	[Reply w/Quote]

11-08-2009, 06:45 PM	#6
vetkaw63 Registered User Join Date: Aug 2008 Posts: 24 Location: User is: OffLine	Re: Spiiting, sputtering, code 44. I got it, every bolt , nut on the intake manifold was loose. I tightened them up and it runs great. I have driven it for a couple hours and it has only spit once at pull off 3 or 4 times. I am afraid that it damaged the intake gasket being loose for so long. Oh well, at least I know what it is now. It runs better than it has in years. Of course I also changed the timing chain, Dissy cap and rotor, pcv, and gas cap. Thanks Guys
	[Reply w/Quote]

11-08-2009, 07:34 PM	#7
neo71665 4x4 v6 blazer Age: 29 Join Date: Oct 2004 Posts: 5,005 Location: rison arkansas User is: OffLine	Re: Spiiting, sputtering, code 44. let me get this right, every bolt on the intake was loose? I bet that thing was dumping oil out of the engine as fast you could pour it in.
	[Reply w/Quote]

11-09-2009, 03:29 AM	#8
vetkaw63 Registered User Join Date: Aug 2008 Posts: 24 Location: User is: OffLine	Re: Spiiting, sputtering, code 44. Neo, I could not see any oil leaking from the manifold. The engine leaks very little oil compared to how old that it is. The engine is copletely covered with a layer of grime, oil. There is thick oil residue in the valley between the valve cover and intake. I had assumed that it was coming from the valve covers. I was thinking more of an internal vacuum leak? I don't know. It runs better than I ever remember it running. Torque settings for the intake are 23 lb. ft. I'm guessing the all were at about 10 lb. ft.. When I first checked with a 3/8 drive ratchet they all turned easily. I broke out my torque wrench at that point. I'm very happy with how it is running.
	[Reply w/Quote]