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Registered
Join Date: Nov 2000
Location: Dallas
Posts: 3,597
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Help, sudden poor running '88 Carrera
Did a quick search but can't seem to find this same issue. Car is '88 Carrera, bone stock, rebuilt engine 20k ago (190k total). Till this incident running perfectly. The only "work" I've done lately has been suspension and brakes. Car started and ran perfectly this morning, drove about 15 minutes and parked for about 3 hours. Started car fine but noticed when waiting to get out of parking lot it was idling rough, then as tried to pull out car backfired and stalled. Fired right up but runs really bad at lower rpms, once I can nurse it past about 2k it runs perfectly (or seems to). At lights it would idle a little rough and then I'd have to feather the throttle to get it off the line and it would drive fine once it was going. It seems to be better as it warms up but the car never got to full operating temps.
Note that this was very sudden, ran perfect up to this last drive. I can;t find anything obvious and I really don't even know where to start...any suggestions on obvious things? Thanks
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Buck '88 Coupe, '87 Cab, '88 535i sold, '19 GLC 300 DD Warren Hall, gone but not forgotten |
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01-21-2013, 10:36 AM
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Join Date: Aug 2010
Posts: 288
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Plug wires?
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-Derek '84 911 coupe |
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01-21-2013, 11:33 AM
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Formerly known as Syzygy
Join Date: Mar 2008
Location: Calgary, AB
Posts: 4,420
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Bad gas?
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01-21-2013, 11:43 AM
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muck-raker
Join Date: Jan 2009
Location: Coastal PNW
Posts: 3,059
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CHT sensor? Pull the white plug from the 3-plug harness on the left hand side of your intake manifold. Bend a paper clip or small-gauged wire and jump the two female plugs from the wire you pulled, and see if that makes a difference in your running condition. Takes 2-4 minutes to do, and it's FREE.
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STONE '88 Cabriolet, using EP Slick 20w50 partial synthetic Snake Oil...just as Rommel intended.  Deny Everything; Admit Nothing; and Always Make Counter-accusations 
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01-21-2013, 11:46 AM
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RETIRED
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Gas or fuel filter....
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1983/3.6, backdate to long hood 2012 ML350 3.0 Turbo Diesel |
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01-21-2013, 11:47 AM
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With Kidrock on the CHT
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01-21-2013, 12:42 PM
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Registered
Join Date: May 2002
Location: St Louis
Posts: 4,211
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On my 88 since i am too cheap to buy new wires i check to see none of the wires has come loose.
After that pull the injector plugs one by one and see if on one the idle doesn't change. These are also free and take moments to perform.
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Rick 88 Cab |
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01-21-2013, 12:59 PM
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Location: Dallas
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I'll check the CHT, odd thins was I was down to less than a quarter tank of gas so if it was bad fuel would that not have shown up before? This was VERY sudden, drover perfectly probs right after start up. Thanks for the replies.
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Buck '88 Coupe, '87 Cab, '88 535i sold, '19 GLC 300 DD Warren Hall, gone but not forgotten |
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01-21-2013, 01:56 PM
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Registered
Join Date: Feb 2006
Location: Palo Alto, CA
Posts: 161
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I also agree you should test the CHT. Is it just running rough at idle? Is there any surging while the car is trying to idle?
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'87 Carrera Cabriolet |
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01-21-2013, 04:13 PM
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Registered
Join Date: Jan 2005
Location: Usa
Posts: 5,573
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All good suggestions above.
Also, check for loose fasteners on your intake (intake manifold leak) and vaccuum line leaks. I've run across a couple of 3.2's with loose intake manifold fasteners. angela
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Hello http://forums.pelicanparts.com/off-topic-discussions/1102514-we-lost-amazing-woman-yesterday.html |
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01-21-2013, 05:36 PM
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Flat Six
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Exactly the same symptoms I experienced when my O2 sensor went TU . . . also wouldn't hurt to swap out your DME relay.
Good luck.
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Dale 1985 Carrera 3.2 -- SOLD 2026 Jaguar F-Pace / 2025 Ford Bronco Sport |
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01-21-2013, 05:42 PM
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Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,494
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look inside the distributor cap for moisture and carbon tracks. maybe one cylinder isn't firing. pull off either a plug connector or injector plug. one at a time while it's running to see if any cylinder is dead, like from a fouled plug or dead injector.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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01-21-2013, 05:51 PM
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Registered
Join Date: Aug 2009
Location: PNW
Posts: 2,977
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Help educate a newbie 3.2 owner; what's the CHT?
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'84 Carrera Cabriolet |
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01-21-2013, 05:55 PM
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RETIRED
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Cylinder Head Temp Sensor....
Get a Bentley Manual.....reads like a novel.
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1983/3.6, backdate to long hood 2012 ML350 3.0 Turbo Diesel |
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01-21-2013, 05:56 PM
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Registered
Join Date: Aug 2009
Location: PNW
Posts: 2,977
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Quote:
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'84 Carrera Cabriolet |
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01-21-2013, 06:06 PM
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Registered
Join Date: Nov 2000
Location: Dallas
Posts: 3,597
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OK...very frustrating...the problem appears to have stopped as fast as it started!!! I got home and started checking everything I could and could not see anything obvious but what do I know. I decided to let it really cool down to see if maybe it only affects cold running. Started it up and ran some errands later and it ran perfect. Filled up the tank and no issues. I have no idea if what caused it now and really don't know what to check. I guess I'll just have to wait for it to happen again... very frustrating.
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Buck '88 Coupe, '87 Cab, '88 535i sold, '19 GLC 300 DD Warren Hall, gone but not forgotten |
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01-21-2013, 07:13 PM
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Da cab
1985 Porsche Carrera
