Have a problem, please read...
Thread Starter
Team Owner
Joined: Nov 2004
Posts: 20,715
Likes: 25
From: Sorrento Italy
Have a problem, please read...
It's sometime now that before the engine fully warms up and cruising at low speed with the engine not yet at full temperature, it runs at 6 (or maybe 7) cil...then, after running at over 4.000 rpms for sometime the engine 'clears up' and the full potential goes back where it should be: a blast!.
As you know i've been privated of my driving licence for a month so i left the car in the garage, at the cold, for 30 days.
Y'day, first day without rain, i've went out with the vette, left the engine warm up and went for a ride on the motorway...the malfunction didnt go away.
It runned with 6 cil for 50 miles, nothing to do, it didnt clear up.
I know the car is running slightly rich, specially at downtown rpms regimes, but over 4.000rpms is runs smooth and thunderous, until y'day...I've tried again today: same damn thing!
It didnt 'clear' at all...
Why?
As you know i've been privated of my driving licence for a month so i left the car in the garage, at the cold, for 30 days.
Y'day, first day without rain, i've went out with the vette, left the engine warm up and went for a ride on the motorway...the malfunction didnt go away.
It runned with 6 cil for 50 miles, nothing to do, it didnt clear up.
I know the car is running slightly rich, specially at downtown rpms regimes, but over 4.000rpms is runs smooth and thunderous, until y'day...I've tried again today: same damn thing!
It didnt 'clear' at all...
Why?
Burning Brakes
Joined: Mar 1999
Posts: 1,047
Likes: 3
From: CA
Could be any number of things. I would start by checking to see if your getting spark to all the plugs. Depending on what you discover, you may want to pull your plugs for clues as to what is going on.
Thread Starter
Team Owner
Joined: Nov 2004
Posts: 20,715
Likes: 25
From: Sorrento Italy
DB, i dont think it's a drivetrain iussue, nor a lifter...there aren't any strange noices coming from that area at all and if there was something broken under the valve cover i'd have noticed it...instead, i believe (...and hope) it's an electrical malfunction...i think one or two plugs dont get spark for some reason, maybe distributor, i will have to check on monday.
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Sounds like all you did was park the car was running fine before that, don't see how anything went wrong with valvetrain, plug wires just sitting there parked. check the dist. maybe some moisture in your fuel tank fuel filter.
Last edited by Little Mouse; Jan 12, 2008 at 03:27 PM.
Race Director
Joined: Nov 2002
Posts: 12,142
Likes: 54
From: Taylor Michigan
A possible spark plug change to a warmer plug {IF} your running a cold plug. I say this because you mentioned it will clear up by itself after driving a period of time. Also the issue of not clearing up after 50 miles the last time would suggest the plug is extremely fouled and will not burn off the last time around.
Could be wrong, but I dont agree with the other suggestions unless the plugs are not fouled.
Could be wrong, but I dont agree with the other suggestions unless the plugs are not fouled.
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Melting Slicks
Joined: Aug 2006
Posts: 3,429
Likes: 20
From: Kingston Ontario
Really though, if you ran it rich, like the other guy said check your plugs. They could have fouled.
Pro
Joined: Oct 2007
Posts: 549
Likes: 5
From: punta gorda florida
Thread Starter
Team Owner
Joined: Nov 2004
Posts: 20,715
Likes: 25
From: Sorrento Italy
...All the 8 plugs were incredibly in bad shape, 3 of them were already half consumed
...actually these plugs have already done a good job, infact these are the ones the builder sent with his engines...anyway it's clear the engine runs slightly rich and driving in the traffic or in heavy trafficked roads makes things more difficult...
...actually these plugs have already done a good job, infact these are the ones the builder sent with his engines...anyway it's clear the engine runs slightly rich and driving in the traffic or in heavy trafficked roads makes things more difficult...
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
I guess I assumed all of that was straight and checked with as well as this car seems to be maintained and worked on.
Next time I'll start simpler.
Melting Slicks
Joined: Aug 2006
Posts: 3,429
Likes: 20
From: Kingston Ontario
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Thread Starter
Team Owner
Joined: Nov 2004
Posts: 20,715
Likes: 25
From: Sorrento Italy
