| Author |
Message |
Lillo Morreale (Morcal)
New member
Username: Morcal
Post Number: 8
Registered: 3-2003
| | Posted on Saturday, October 18, 2003 - 4:49 pm: | |
Exhaust manifolds of gasoline turbo engines will normally tend to glow as the temperature there may reach 950 Deg celsius ( do not know in Fahreneit ) so that no big panic. However if something is wrong with the mixture (too lean ) this effect could be more evident as lean=hot. If also the turbine is a bit too small and/or sealing rings worn, the crank case may get pressurized by the gas or charge air and push off the oil cap. Check also ignition timing as turbo engines to avoid detonation do have the stock timing curve re-adjusted. |
MICHAEL MORETT (Thecarreaper)
New member
Username: Thecarreaper
Post Number: 20
Registered: 9-2003
| | Posted on Wednesday, October 15, 2003 - 4:23 pm: | |
after the engine is warm and the idle speed is set you can set the mixture by leaning it out until the idle drops, as you richen the mixture the idle will go up and then level off and be " too rich" you want it lean enough to run well but not lean enough to cause problems. on a fuel injected turbo a vaccum gauge would help alot. i should mention that a vaccum leak will screw the whole process up since you wont be able to get the idle speed right to start with. |
MICHAEL MORETT (Thecarreaper)
New member
Username: Thecarreaper
Post Number: 19
Registered: 9-2003
| | Posted on Wednesday, October 15, 2003 - 4:16 pm: | |
take this with a grain of salt as i dont have a ferrari in front of me as a referance, but i would start by setting the idle speed to the speed indicated by the emissions tag or shop manual. also try hooking up another tach as old factory ones can be inaccurate. what worries me is perhaps the rich condition was going on for some time and the rings have been " washed out". by this i mean that the oil was bieng removed and the rings have lost thier seal. the turbo bieng new may be putting too much pressure in the crankcase by blowing past the rings. a compression test will tell you this really quickly. there are plenty of threads on how to do it yourself if you have the time to tinker with it.i hope i did not offend or panic you with the " do not drive it" comment but i have seen some really bad results from ignoring the symtoms you have desribed. check your oil and see if its really thin and smells of fuel.this may help with the rich/lean question . i hope my rambling will help some. michael |
Rick Oliver (Ooisdfa)
New member
Username: Ooisdfa
Post Number: 3
Registered: 10-2003
| | Posted on Wednesday, October 15, 2003 - 3:08 pm: | |
Does anyone know how to adjust my combustion mix correctly or where I could go to have it done right. (Please don't say Italy) |
Rick Oliver (Ooisdfa)
New member
Username: Ooisdfa
Post Number: 2
Registered: 10-2003
| | Posted on Wednesday, October 15, 2003 - 3:05 pm: | |
Thanks for the help. I don't know where to start. I guess I start the process of elimination. I have a strong feeling that is running lean. As to why I don't know. I do know the the mechanic that replaced the turbo was adjusting the idle with the throttle position adjustment screw (the manual says this is sealed by that factory)I hope he didn't screw things up. It wasn't running that well before the new turbo but is obviously worse today. Thanks again!
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MICHAEL MORETT (Thecarreaper)
New member
Username: Thecarreaper
Post Number: 18
Registered: 9-2003
| | Posted on Tuesday, October 14, 2003 - 9:06 pm: | |
RICK.... DO NOT DRIVE THE CAR... until you are sure what the problem is. i have had turbo grand nationals and trans ams exibit this behavior and it was a combination of too much fuel and incorrect timing causing the oil to be "watered" down by the fuel. the excess fuel in the exhaust will make the pipes glow and can damage the turbo, the turbo bearings and the motor in general. i would rather be wrong on this and have egg on my face than see you damage your car. there may be a fuel pressure relief problem or a fuel injector stuck open. i would assume in a turbo 308( !!!!) that a big ignition timing problem would be very noticeable, while a stuck injector or fuel pressure problem would not be as noticable. fuel in the the oil will do very bad things very fast to the engine. if i am wrong please beat me up but dont risk hurting that car!!!!! |
Tom Bakowsky (Tbakowsky)
Member
Username: Tbakowsky
Post Number: 714
Registered: 9-2002
| | Posted on Tuesday, October 14, 2003 - 5:14 pm: | |
Check your crank vent system. If you have a blockage somewere in that system,then you could be building up too much presseure in the engine. This could defenatly cause your oil cap to pop off. |
Philip Airey (Pma1010)
Member
Username: Pma1010
Post Number: 480
Registered: 7-2002
| | Posted on Tuesday, October 14, 2003 - 1:14 pm: | |
Rick
I've always thought a manifold glowing red means the mixture is lean and you'll be burning up ex. valves. However, you state the glow is at the collector. Could unburnt gas or oil be burning at this point of restriction?
I'd also pull the plugs to see what's happening to mixture. |
Rick Oliver (Ooisdfa)
New member
Username: Ooisdfa
Post Number: 1
Registered: 10-2003
| | Posted on Tuesday, October 14, 2003 - 12:57 pm: | |
Twice now my oil cap has come off during rather hard driving. I notice blue smoke in my rear view and I know what just happened. Maybe I'm not putting it on tight enough but twice seems to be a pattern developing. One, the idle is rough. Two, it has a turbo (just replaced but did it before too). Three, oil pressure gage not working. Oil lights on the dash turn off but takes longer then I expect they should. Four, I notice cherry small red glow at the exhaust/header junction (is this normal?)the water and oil temp are under 210 and 220. Five, the car has a heavy exhaust/gas odor. |