Bad news for the ol' 2.8...? tell me what you think.
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Joined: Apr 2001
Posts: 1,408
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From: Bayville NJ and Newark at NJIT.
Bad news for the ol' 2.8...? tell me what you think.
Ok... 147K hard miles... I don't think the heads have ever been off... hell, I just took the original water pump and shocks off...
I have this miss... have had this miss.. and it pisses me off!!! So today I started trouble shooting... I couldn't locate an exhaust leak like I thought it was... on a hunch I pulled the PCV... smoke... not alot, but there... pulled dipstick, no smoke... ok rings are good, but that must mean I have a shot valve somewhere...
But!
I could see that the smoke was coming up in bursts... right along with some ticking I've been having (I thought it was injectors pulsing)... so my thought it a stuck lifter, bent pushrod or a shot valve seat.
And, I can bet I know how it happend... A while ago I had a problem with an injector not pulsing.. since been replaced (worst $128 I ever spent)... But I'll bet that incredibly lean dry cylinder burned the valves up...
Would that do it? Or should I go back to looking for an exhaust leak?
------------------
1985 Camaro SC - 2.8L, auto.
C'mon, spin 'em for papa...
http://www.xenodrgn.f2s.com/Frontright.jpg
I have this miss... have had this miss.. and it pisses me off!!! So today I started trouble shooting... I couldn't locate an exhaust leak like I thought it was... on a hunch I pulled the PCV... smoke... not alot, but there... pulled dipstick, no smoke... ok rings are good, but that must mean I have a shot valve somewhere...
But!
I could see that the smoke was coming up in bursts... right along with some ticking I've been having (I thought it was injectors pulsing)... so my thought it a stuck lifter, bent pushrod or a shot valve seat.
And, I can bet I know how it happend... A while ago I had a problem with an injector not pulsing.. since been replaced (worst $128 I ever spent)... But I'll bet that incredibly lean dry cylinder burned the valves up...
Would that do it? Or should I go back to looking for an exhaust leak?
------------------
1985 Camaro SC - 2.8L, auto.
C'mon, spin 'em for papa...
http://www.xenodrgn.f2s.com/Frontright.jpg
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Joined: Jul 2001
Posts: 4,461
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From: BFE, MD
Car: 13 Ram 1500/ 78 Formy
Engine: 5.7 / 7.4
Transmission: 6sp / TH350
Axle/Gears: 3.55 posi / 3.23
The only time I had do deal with a burnt valve was on my 63 studie, had black smoke pulsing out of the tail pipe. do you have this, or is it just coming out the pcv hole?
yeah, a lean condition could have burnt it.
hopefully you will not have to pull a head, I just finished two & it sucks!
------------------
$150.00 2.8 Auto.
short block now
turbo eventually, 3.4 may be in the future
Giving the enemy the opportunity to die for their country
yeah, a lean condition could have burnt it.
hopefully you will not have to pull a head, I just finished two & it sucks!
------------------
$150.00 2.8 Auto.
short block now
turbo eventually, 3.4 may be in the future
Giving the enemy the opportunity to die for their country
Thread Starter
Moderator
Joined: Apr 2001
Posts: 1,408
Likes: 1
From: Bayville NJ and Newark at NJIT.
Nope, no black smoke...
I suppose it's the seals just beginning to go...
I no longer think it's a big problem like this, because if I reset my computer it'll idle fine for a little while longer than it usually does.
My bet is that a new CTS, O2, IAC, ignition coil, and TPS will solve all my problems...
------------------
1985 Camaro SC - 2.8L, auto.
C'mon, spin 'em for papa...
http://www.xenodrgn.f2s.com/Frontright.jpg
I suppose it's the seals just beginning to go...
I no longer think it's a big problem like this, because if I reset my computer it'll idle fine for a little while longer than it usually does.
My bet is that a new CTS, O2, IAC, ignition coil, and TPS will solve all my problems...
------------------
1985 Camaro SC - 2.8L, auto.
C'mon, spin 'em for papa...
http://www.xenodrgn.f2s.com/Frontright.jpg
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