home register FAQ memberlist calendar

Go Back   Turbobricks Forums > Mechanical > maintenance & nonperformance

Reply
 
Thread Tools Display Modes
Old 06-28-2021, 12:36 PM   #26
89_740Turbo
Board Member
 
89_740Turbo's Avatar
 
Join Date: Apr 2018
Location: Central New Jersey
Default

I was driving in my old 740 during a rainstorm and had to drive through a big puddle because I couldnt switch lanes. I was running IPD lowering springs so, closer to the water haha. When I woke up the next day and turned it on, it was puttering and sputtering. Sounded like stomach ache farts. Anyway, I checked the spark plugs and spark plug wires - discovered that water has affected 1 of my spark plugs and moisture was inside 2 spark plug wires. I changed the spark plug, checked every other one too, dried out the spark plug wires and opened the distributor and sprayed a little wd40 on it to remove any moisture. After that, the sputtering and puttering stopped and it ran smoothly again.
__________________
1989 744Ti
1988 744Ti
1986 744GLE (RIP)
My Feedback Thread - http://forums.turbobricks.com/showthread.php?t=342247
89_740Turbo is offline   Reply With Quote
Old 06-30-2021, 02:47 PM   #27
DavePolyakov
Board Member
 
Join Date: Aug 2020
Location: Shoreline, WA
Default

Pulled my spark plugs they each had a gap around 0.028-0.030. I noticed the threads were oily. I've been told by my friends that when I'm boosting in front of them on the road they see black smoke pop from the exhaust. Is this lh2.4 dumping fuel when it sees more than 7psi? Some TLAO chips may help?

__________________
DavePolyakov is offline   Reply With Quote
Old 06-30-2021, 03:02 PM   #28
dl242gt
Happy playing the blues
 
dl242gt's Avatar
 
Join Date: Jun 2002
Location: S NJ, a suburb of Phila.
Default

Might be that the PCV system is not working well. That puts some oil into the combustion chamber.
__________________
Dave,
1982 242 turbo. 338k miles. MVP coilovers and 3" exhaust. Flowed 405 with a V15. Cossie turbine housing with upgraded compressor housing. 90+, IPD remote oil filter. Some other goodness, too. Been lots of fun over 25 years. Restored in 2k. Now ready for a 2nd restoration.

1993 245 Classic, 435k miles, enem V15. IPD bars and chassis braces. Simons sport exhaust from Scandix. sbabbs ezk chip. Been a good road warrior. Genuine Volvo rebuilt leaky M47.
dl242gt is offline   Reply With Quote
Old 06-30-2021, 03:07 PM   #29
DavePolyakov
Board Member
 
Join Date: Aug 2020
Location: Shoreline, WA
Default

I just cleaned all PCV components. The plugs look ok though right? The issue probably lies elsewhere?
Quote:
Originally Posted by dl242gt View Post
Might be that the PCV system is not working well. That puts some oil into the combustion chamber.
DavePolyakov is offline   Reply With Quote
Old 06-30-2021, 07:18 PM   #30
dl242gt
Happy playing the blues
 
dl242gt's Avatar
 
Join Date: Jun 2002
Location: S NJ, a suburb of Phila.
Default

Yes, I agree that the plugs look ok. Maybe try a slightly thicker oil like 15-40w and see if that improves. You can also with a cold engine remove the intake hose and check the turbo for excessive shaft play.
dl242gt is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -4. The time now is 09:43 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.