• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

Idle dropping and bouncing??

suitercrew

suitercrew

New member
Not everytime but pretty frequently if i rev it when in park as soon as i let go of the accelerator rpms will drop really low and bounce back up. This has also happened at a light when i was stopped engine was idling fine right in the 700-750 range then when i went to give it gas rpms dropped really low then shot back up.

Sent from my LG-D851 using Tapatalk
 


Don't use the carb cleaner on the MAF. Use MAF cleaner on it. The TB is ok. If you have some electronics parts cleaner around you could use that on the MAF.
 
Ok thanks. So ten minutes in im disconnecting the throttle body and theres two hoses that conjoin into one at the throttle body and where it conjoins there is a huge slice down the middle the two other hoses lead to the evap purfe solenoid and the fuel pressure regulator. Could this be a cause?

Sent from my LG-D851 using Tapatalk
 
Is there supposed to be puddles of oil in the valleys of the intake manifold and is the upper manifold supposed to have oil spray all over it?

Sent from my LG-D851 using Tapatalk
 


suitercrew said:
Is there supposed to be puddles of oil in the valleys of the intake manifold and is the upper manifold supposed to have oil spray all over it?

Sent from my LG-D851 using Tapatalk
Click to expand...

Yes, the PCV valve does that. Mine had it when I did the LIM. Not sure about the UIM though.
 
suitercrew said:
Why would they make it like that? What if you never changed it?

Sent from my LG-D851 using Tapatalk
Click to expand...

Because GM. And change what, the PCV? Take it out and shake it. If you hear it rattle, then it's good and you don't need to replace it.
 
suitercrew said:
Ok thanks. So ten minutes in im disconnecting the throttle body and theres two hoses that conjoin into one at the throttle body and where it conjoins there is a huge slice down the middle the two other hoses lead to the evap purfe solenoid and the fuel pressure regulator. Could this be a cause?

Sent from my LG-D851 using Tapatalk
Click to expand...


that split is your problem. you need to hit a parts store, advance sells the best little t's. you need a Y and some vac line that fits the tb, then some smaller line to push inside the fat line, the Y to the other two small lines and the new line off the tb.

you'll need to cut or pull off th eold factory rubber end off the hard lines, then put a inch or so of new vac line on the end of the hard lines to the Y.
 
Well the one hose that goes to the purge solenoid has that fuel line connector on it so i thought it might be a "special order" kind of part unless that tip just pops off the hose?

Sent from my LG-D851 using Tapatalk
 


Hey so im doing the rear vc gasket since its alot easier access with everything off but whats up with the gaskets on the bolts themselves because there breaking when i take them off and my new vc gaskets didnt come with any

Sent from my LG-D851 using Tapatalk
 
Ok thanks scotty, have to make a trip to the parts store anyway cause they sold me the wrong lim gasket ugh.

Sent from my LG-D851 using Tapatalk
 


No it's not "cause GM". Many manufacturers use PCV valves. It's your responsibility to maintain your car properly. Just take it out and check it once a year.

Also I've used 4 different brands of PCV valves and the only one that has worked flawlessly is AC Delco.

Sent from my LG G3
 
You must log in or register to reply here.
Back
Top