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88delta88
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Posted: Fri Jun 13, 2003 5:05 pm |
TOC Village Idiot |
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Joined: Mon Jun 09, 2003 5:06 pm Posts: 2415 Images: 40 Location: Canada
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My car has ALWAYS idled roughly, since I bought it. It drives beautifully, and the engine is very strong, with only 130,000 km's on it (just over 70,000 miles I think). The problem is missing while idling.
I have done the following to no avail:
-new spark plugs, gapped to spec.
-new set of spark wires
-cleaned injectors to no end...
-fuel filter is fine
-oil is always clean as a whistle, but I did an engine flush anyways (thought something might be sticking in the lifters...)
-checked the crankshaft position sensor
-checked the camshaft position sensor
-had to change the timing gears and chain, the chain slipped on the aluminum gear for the camshaft, rounding off all the teeth. (kinda thought that would fix it for sure, but not)
No success. Engine runs very smooth when it is cold. The rough idle isnt really bad, but its annoying. Doesnt die when I shift from park, which is common among idle problems...
Havent yet looked at the PCV valve yet, but should that affect it?
Any ideas would be better than what I can think of...
Thanks,
Aaron
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strokercutlass
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Posted: Sun Jun 15, 2003 12:25 am |
TOC Mechanic |
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Joined: Mon Jun 09, 2003 12:17 am Posts: 378 Images: 13 Location: Wis
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actually, the majority of the 3.8's with higher mileage have this problem..rough running condition at idle, which smooths out when they come off idle and throughout the powerband....not a real easy cure that i'm aware of....seems to be a problem related to the 3.8 engine family specifically....could be a number of things, weak cylinder pressure, weak injector, slightly burned valve...as i said..this IS a common problem, without a real easy cure..my best advice is unless its REALLY bad...dont worry about it
_________________ Shawn's Auto Repair and Performance, SW Wis.
www.shawnsautorepair.procarcarezone.com
69 Olds Cutlass S
70 Olds Vista Cruiser Wagon
72 Olds Cutlass S, 12:1 470 stroker, JM40 solid lifter cam, TH400, 3500 10" PTC stall, 4.11 posi
74 442 455/TH350
79 Cutlass 455/TH375 sleeper
'97 GMC Sierra Ext Cab 9" lift w/ 37's
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strokercutlass
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Posted: Mon Jun 16, 2003 7:20 pm |
TOC Mechanic |
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Joined: Mon Jun 09, 2003 12:17 am Posts: 378 Images: 13 Location: Wis
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88 delta..from what i've seen in my won experiences, it seems to be more prone in the series 1 engines...dunno if its something that was changed in the series 2 design or not.....
_________________ Shawn's Auto Repair and Performance, SW Wis.
www.shawnsautorepair.procarcarezone.com
69 Olds Cutlass S
70 Olds Vista Cruiser Wagon
72 Olds Cutlass S, 12:1 470 stroker, JM40 solid lifter cam, TH400, 3500 10" PTC stall, 4.11 posi
74 442 455/TH350
79 Cutlass 455/TH375 sleeper
'97 GMC Sierra Ext Cab 9" lift w/ 37's
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Spinmaster30
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Posted: Tue Jun 17, 2003 7:16 pm |
Team Olds Founder |
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Joined: Mon Jun 09, 2003 5:46 pm Posts: 4 Location: Michigan
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all of the 3.8l engines had a rough idle. it was the way that the engine was calebrated and there is nothing to do about it.
_________________ spinmaster30@aol.com e mail me to join TEAM OLDS. We now have decals for sale $5
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88Ciera_SC
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Posted: Fri Jun 27, 2003 9:53 pm |
TOC Member |
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Joined: Tue Jun 10, 2003 1:00 am Posts: 188 Images: 38 Location: Columbus Ohio
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you got a picture of the decal???
_________________ http://www.cardomain.com/id/88ciera_sc
1988 Cutlass Ciera SC
3.8L Sequential Fuel Injection
Horsepower- 160 @ 4000 RPM<factory lie
Torque(lb-ft)-215 @ 2750 RPM
Displacement- 3802cc
4 Speed Automatic
This WAS My Dad's Oldsmobile
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Brando
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Posted: Fri Jun 27, 2003 11:12 pm |
TOC Admin |
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Joined: Fri Jun 06, 2003 3:58 pm Posts: 3166 Images: 29 Location: Michigan, USA
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I have a pic, I'll post it in the album!
Also, my 3.8L idles rough too....
TOC Admin
Brando
_________________ 1999 Oldsmobile Intrigue GLS 1987 Oldsmobile Delta 88 Royale
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Psyco Diver 69
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Posted: Sun Sep 21, 2003 1:30 am |
TOC Member |
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Joined: Sun Sep 21, 2003 1:20 am Posts: 207 Images: 8 Location: South NJ
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My old cutlass had the same problem then I found out I needed a new choke puller (thats the names, it is a vacume diaphram) and it helped my rough idle alot
_________________ Jake 19/m
1972 Olds 442 - 350/th350/3.73 posi - Project "C6 Killa"
1985 Olds Cutlass Supreme - 231/th200c/2.41 peg leg - winter beater
1972 Olds Cutlass- Parts car
www.cardomain.com/id/psycodiver69
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