1997 chev 5.0 liter

[ratmn218]

if i dont let truck warm up, acceleration is kinda doggy,no miss, no check engine light on .after up to temp, acceleration seems normal, any ideas???

[Tyler23]

getting wore out? just cold blooded? our camaro is that way...

[ratmn218]

90,000 miles wore out, dont think so.

[Whoaru99]

Quote:

any ideas???

Let it warm up a bit before putting the hammer down?

[Jeremy airjer W]

The first thing I would do is monitor live data on a scan tool to see if there are some clues.

[Tyler23]

90,000 miles wore out, dont think so.

good thing you stated that it only had 90,000 on it huh?

[ratmn218]

oops, my bad. looked today and it has 97000, i do run a k&n air filter if that helps get some clues.was thinking something with the mass air flow????

[theoilman]

Oil wetted air filters can cause mass air flow sensor problems. (Sometimes vehicle manufacturers will not honor engine / emission systems warranties because of installation of oil wetted air filters.)

[Jeremy airjer W]

If the mass air flow is dirty than it usually causes things to go lean. A cold engine needs to be richer until it warms up. A false lean condition could cause your symptoms. Cleaning the MAF with some MAF sensor cleaner might help. Certainly worth the couple bucks for the cleaner.

[ratmn218]

can i use carb cleaner or brake cleaner ?

[Jeremy airjer W]

No carb cleaner.

Brake cleaner should be fine but there are a few out there that are super potent. I know the 3M stuff is fine to use as well as the stuff we get in the barrel which I can't remember the name of off hand.

[Whoaru99]

Or perhaps some other sensor giving inaccurate readings...coolant temp sensor, maybe?

[Jeremy airjer W]

Or perhaps some other sensor giving inaccurate readings...coolant temp sensor, maybe?

Absolutely, that's why monitoring the vehicle with a scan tool during its warm up would be beneficial.

[ratmn218]

fyi, did buy maf cleaner and cleared up the problem.

[Jeremy airjer W]

Sweet!