RE: HELP! Rough Idle, Vac hose???
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RE: HELP! Rough Idle, Vac hose??? - 3/19/2008 5:52:23 PM
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JPC97DiscoSD
Posts: 41
Joined: 2/29/2008
Status: offline
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Cliff notes: Cleared the CEL - no return : Did a Compression test - Low compression on cyl 4.
I don't have the compression numbers off hand, but cyl 4 was significantly lower than the other cyls.
Ok Disco Mike, thanks for the advise over the phone, before I go about repairing the cracked exhaust manifold you suggested (cyls 2 4 6 8 manifold) I figured since I am fortunate enough to have a Euro garage down the street, it wouldn't hurt to get a visual opinion of what the problem is on my truck.
So......After messing around for a while and not making any progress, I took my truck to the independent Euro mechanics so they can have a quick look over and give me their opinion, thank God they are around the corner from me minutes away and I was able to drive there. So I gave it a shot, the compression test cost me a few bucks even though I could have done it myself. In a sense I am glad I am getting to the bottom of this.
So the next day, I get a call and they ran a compression test which revealed low compression on Cyl. 4. So I have an internal problem now. The truck runs and drives, it is just really sluggish at around 2 - 3.5 rpms. This problem seems to have happened overnight and I am thinking the problem is in the heads, maybe stuck valves. I don't want to know what it looks like under there, maybe the previous owner ran 87 octane, and it was just a matter of time before the damage was done.
Is there any way I can clean the valves with an additive or something before I start digging deep into the engine and my pockets, should I change the oil and add some compression booster or some kind of engine treatment. I ran a can of seafoam thrrough the intake, should I do a can in the crankcase? Let me know what you guys think. I do have a crack on my exhaust manifold by cyl.4 - would that cause the problem, when it is running slugging it backfires through the intake and pops? It feels like I am running without a spark plug. Although it starts right up smoothly. Thanks for the input in advance.
< Message edited by JPC97DiscoSD -- 3/19/2008 5:56:00 PM >
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RE: HELP! Rough Idle, Vac hose??? - 3/20/2008 12:41:54 PM
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JPC97DiscoSD
Posts: 41
Joined: 2/29/2008
Status: offline
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OK I flushed the engine, changed the oil with Castrol Syntec 5W/30 along with a quart of compression booster additive to thicken the oil and let the truck run for a bit and I noticed than my CEL came on here are the codes it threw:
P1316
P1204 Pd
P0204 Pd
P1193 Pd
Also, everytime I run the car the problem seems to get worse and worse. I noticed it was puffing out some bright white smoke after I changed the oil and filter. It almost seems like the head gasket has failed, but I don't know, I haven't had any coolant loss issues or signs of leaks, the truck never overheats. There was a white looking filmy residue on the inside of my oil cap and the used oil had a scent of gasoline in it. Would a bad head gasket cause compression loss and cause the truck to run terrible? I am starting to think my problem is either a bad head gasket(s) or the heads need to be redone, maybe a stuck valve is causing all this... I doubt that the bottom end is the problem, it doesn't burn any oil or anything. It runs beautiful on a cold start and then after 2 mins its all downhill. What should I look for guys?
< Message edited by JPC97DiscoSD -- 3/20/2008 9:31:37 PM >
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