Rapidly moving vacuum gauge at idle - smooth above 1k
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Re: Rapidly moving vacuum gauge at idle - smooth above 1k
A leak down test is a good next step. You can inrich the mixture at idle with propane to see if the engine wants more fuel. Just thinking.
A good test is worth a thousand opinions.
Smokey
Smokey
- BigBlockMopar
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Re: Rapidly moving vacuum gauge at idle - smooth above 1k
Just did a compressiontest with a screw in type gauge.
All cylinders were between 208 - 210 psi, except cyl. 6, which had ‘only’ 195-198 psi.
Engine temp was around 135F, carb at WOT.
I did 2 tests in a row, one bank at a time from front to back: 1357-2468-1357-2468.
First round I got numbers just above 200-205 psi, second round I got the numbers mentioned above.
So my focus is on cyl. 6.
All cylinders were between 208 - 210 psi, except cyl. 6, which had ‘only’ 195-198 psi.
Engine temp was around 135F, carb at WOT.
I did 2 tests in a row, one bank at a time from front to back: 1357-2468-1357-2468.
First round I got numbers just above 200-205 psi, second round I got the numbers mentioned above.
So my focus is on cyl. 6.
Re: Rapidly moving vacuum gauge at idle - smooth above 1k
Hello Big block mopar... did you mange to find out the problem. Thankyou, Inhave the same problem as jou have
Re: Rapidly moving vacuum gauge at idle - smooth above 1k
Does it have any valve train noises?
A good test is worth a thousand opinions.
Smokey
Smokey
- BigBlockMopar
- Momentary Specialist
- Posts: 336
- Joined: Fri Mar 25, 2016 8:53 pm
- Location: Netherlands
- Contact:
Re: Rapidly moving vacuum gauge at idle - smooth above 1k
Older topic, but,
no obvious valvetrain noise present, but I can tell during driving when valve-lash is getting upto around .010".
I currently have the engine opened-up and will replace the iron heads for a pair of aluminium heads and will do a cam change as well. Going to a hydr. roller.
no obvious valvetrain noise present, but I can tell during driving when valve-lash is getting upto around .010".
I currently have the engine opened-up and will replace the iron heads for a pair of aluminium heads and will do a cam change as well. Going to a hydr. roller.