TerrycabralForgot

My 95 Maxima idles great in park or neutral but not in gear. It shakes at stop lights like it wants to die but runs good down the road. I did change plugs a couple months ago.

The Wizard

iTrader: (43)

https://maxima.org/forums/4th-genera...e-contest.html

Have you searched the Org yet? The solution is out there.

First, did you put NGK plugs in?

First thing you should look at/diagnose/test is the MAF.

Check for vacuum leaks?

DennisMik

iTrader: (2)

Is the check engine light on? Does the check engine light even work?

TerrycabralForgot

I think I put in NGK plugs,is that what you recommend? Going to clean Maf today and have the cel code read. Light has been on since I bought it. It had a code for the purge control solenoid. I replaced it twice and the cel would never go out. It only started idling rough a few days ago. I replaced plugs a couple months ago. I think they are possibly Bosch plugs now that I think about it.

TerrycabralForgot

Update,yes I did put Bosch plugs in. It had Denso in it prior. Cleaned MAF and throttle body,seems to idle better. Had codes checked. 325 knock sensor,1443 evaporate purge solenoid which I replaced,1400 egr pressure low circuit input and 125 insufficient coolant temp for closed loop fuel control. Can anyone shed some light on these?

DennisMik

iTrader: (2)

The P0325 shows up whenever there is any other code and usually goes away when the real problem is fixed. The P1443 will not do this. I'm pretty sure the P1400 won't either.

That leaves the P0125. It is either the ECTS or the thermostat stuck open. Odds are it is the ECTS because in summertime, the engine will run warm enough to avoid this code even if the thermostat were a problem. You can check the resistance value of the ECTS. You don't have to remove it, either. Just unplug the wires from it.

The resistance at 70º F is around 2 ohms. At 195º F it should be around .2 (two tenths) ohm. The resistance goes higher as the reported temperature gets colder. For example at 0º F, the resistance is approx 4 ohms.

The Wizard

iTrader: (43)

Get those Bosch plugs out of there. NGK platinums or coppers (much cheaper, but you'll have to replace them in 30k miles).

Either these Bosch plugs are the issue, or your MAF is on its way out. If you go for a new MAF, get an OEM used one, as aftermarket generic MAFs don't respond well in our cars.

max ride 41

iTrader: (4)

and, no need to start 2 threads about same and/or similar problems. try searching first, as wizard stated, the answers in here. heck, the answer can be googled with similar results.