Litl T&A

I started a thread a while ago about a hesitation when under throttle. There was a plug wire not completely on the plug side. I think I fixed that, But when I'm putting a load on at say 1500 rpms it doesn't run smoothly, it's like it "jerks" and bogges along.. What is the lowest rpm I should go? At higher rpms it's fine under any load. Is this normal? If not what could be done? I'm going to put new plugs, and wires on soon.... All stock car with only a cat-back exhaust..
Thanks

M4N14C

iTrader: (3)

Sounds like you're lugging the engine. I would never put my engine under heavy load under 1500RPM.

Be more specific in describing "under load". Are you trying to pass someone doing 40 in 5th gear? Are you going up a hill?

Litl T&A

By under load I mean simply giving it gas.. I'm having a mechanic drive it soon.
So it could be normal? Has this ever happed with your car?
Thanks

wssix99

iTrader: (5)

If the problem goes away at higher RPM after a few seconds, it classic dirty MAF.

Litl T&A

Would the dirty MAF show up on a diagnostic tool? I tried to clean it before with fast evaporating electrical cleaner, but it didn't help with problem..Might have to replace?

M4N14C

iTrader: (3)

Well if I am in a parking lot, doing 2nd and under 1000rpm, the car does jerk back and forth if I give it some gas. But I never experienced this at speed.

Homeless2bNY

iTrader: (2)

clean or replace the MAF

replace plugs and wires

gap plugs at 55 and run NGKs.

Litl T&A

I had the car checked for codes and nothing came up. Wouldn't the diagnostic tool show a code if it was faulty ? If I decided to replace the unit any MAF's I should be looking for?
Thanks

vtirocz

My car had a weird "non-linear" throttle response in the 1500-2000rpm region at relatively low load a while back. Cleaned MAF sensor with CRC maf sensor cleaner and that issue was fixed. No faults / MIL present in my case.

Litl T&A

Will using a spray can of Electronics cleaner reck the MAF???
Thanks

TX98Z28

If it were me, I would use a can of CRC MAF cleaner they sell it at all the main auto parts stores. CRC also makes an electronics cleaner but I don't know if its safe to use it on the MAF Sensor or not. Make sure not to touch any of the wires on the MAF with anything other than the spray. Spray your IAT Sensor while your at it to, just good to clean them both at the same time.

JDEP162

This^^^ worked well for me. I saw the electronic cleaner, but got the maf cleaner as suggested, and it works well.

wssix99

iTrader: (5)

No - A dirty MAF will not throw a code. (A totally bad one will.)

You need to use a non-residue electrical contact cleaner. The catch is that some of these can dissolve plastic - so there is a special type of MAF cleaner that is plastic-safe.

When you cleaned it before, did you use a non-residue cleaner? If not, other chemicals can deposit residue, which just fouls the MAF with another kind of dirt.