| Author |
Message |
Bill V (Doc)
Junior Member
Username: Doc
Post Number: 236
Registered: 9-2001
| | Posted on Sunday, February 02, 2003 - 3:59 pm: | |
Ken--one other thought. If , in testing things out, you wind up letting the car idle in that condition for very long, it would be a good idea to change the oil, as raw fuel can flow into the oil supply from the non-firing cylinders causing a watering-down of the viscosity. |
Bill V (Doc)
Junior Member
Username: Doc
Post Number: 235
Registered: 9-2001
| | Posted on Sunday, February 02, 2003 - 3:55 pm: | |
Hi, Ken--you know that I've been there! It does sound like a bank is cut out, from your description--that's what mine did. If you were fooling with the igntion wires and an entire, single bank is cut out, you may have done something to the coil wire going to that bank. To test which one, disconnect a coil wire and start the car up. If it runs exactly the same as you described, the disconnected wire is at fault. If it won't turn over at all, it's the connected wire which is at fault. Don't disconnect a coil wire while the engine is running --it's shocking!
If the car runs the same with either coil wire off, then it's likely not the coil wire. Since you were doing something to the ignition wires, you may have damaged some of them in some way. To test each one, merely pull each ignition wire off of each plug , one at a time, and listen for changes in idle. If your wires are old, moving them about could possibly cause some cracking in their cores or insullations.
If you used solvent to detail your engine while you were detailing the wires, you could have gotten solvent on the pick-up senso or its connection for that bank of cylinders also. Solvent can damage the sensor.
Good luck, Ken--give me a call if you'd like.
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Lawrence Coppari (Lawrence)
Member
Username: Lawrence
Post Number: 488
Registered: 4-2002
| | Posted on Sunday, February 02, 2003 - 3:40 pm: | |
Start it up and let it run for 20 seconds. Shut it off and put your hand on the exhaust header for each cylinder. You'll know quickly whether the cylinder has been firing. |
Ken Ross (Kdross)
Junior Member
Username: Kdross
Post Number: 224
Registered: 2-2002
| | Posted on Sunday, February 02, 2003 - 2:08 pm: | |
Today I started up my 308QV since it has not run for a while. The car started up fine, but the idle was lumpy and only at 500 rpm. In addition, the sound at idle was not the normal deep sound the car makes. The idle is usually at 1,000 rpm and sounds nice and full. I did detail the engine compartment (specifically the spark plug wires) last month and I am wondering if I knocked something loose. Is there an easy way to tell if both my banks are working, or if one bank is shut down? Thanks.
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