I have 96 maxima with 250000 millage. I take care of it bigtime. the problem is:

1st engine light on and the code is P1400 which is EGR.

what happening is

when i drive it on the highway drives perfect even if im speeding 90 or 100 mph with no issues.

But when i stop at the red light rpm start moving and goes between 500 down to lets say 470 rpm and when i push on gas it turns off and when i turn it on it runs with some hesitation and then fine. on the other red light no problem but u feel the hesitation but not that hard.

now, when i add lucas or BG the car runs perfect when i stop like nothing wrong with it, with lucas it works fine for almost 2 weeks and with BG for a month or 2 and then the problem comes again.

i replaced the fuel filter, spark plugs, and i change oil every 3000 mile I use Castrol syntec, gas i use chevron only with supreme gas i mean i always use the best.

so any help please.

 

Clean your EGR.

 

Thanks for reply, but does Egr stop the car as i said and works with injectors cleaner? by the way, when i go to work in the morning i dont have any issues it happened when i come back what i mean after long drive...

 

Have you done other maintenance like cleaning the IACV?

 

Yes i got one used, i cleaned it and installed it... but again what making me crazy is when i add any fuel injectors cleaner it works fine for 2 weeks then problem come back and when i reset the check engine after 20 or 30 miles come again with the same code P1400. i replace the knock sensor with new one, and vacume on the left of the egr replaced too.

 

Model Year: 1996
Flashing CEL code: 1005
OBD-II Standard P Code: P1400
Code Description: EGRC Solenoid Valve

 

Just so you know I have this code too, been researching and just decided to try replacing the EGR solenoid. This is a small valve assembly with a green connector RIGHT next to the opening between the UIM and lower. You have to move this sensor to get to the Knock Sensor. Easy to find really.

http://forums.maxima.org/4th-generat...ml?ref=esp-img

the green thing in the center of this photo. Thats the valve you want to diagnose

 

I test the egr solenoide and its 46 oms, i replaced it with another one shows 34 oms then reset the engine light. i drove it for 20 miles in a traffic places the check engine light still off.
now, when i stop and then move i push on gas 3 to 4 rph lets say and then slow down and stop the car stop move i move i turn it off and drive normal later. sorry for confussing but i notice that problem happen when i push too much on gas... my mechanic says you need to clean tha fuel tank, because when i use injector cleaner it works fine... and no code so far... any advise please....

 

I dont think its your fuel tank needing to be cleaned. The EGR system means Exhaust Gas Recirculation. Usually these things are all the valves and solenoids and vacuum systems LONG before its ever an issue with something as simple as a dirty fuel tank.

Although I have read a thread before that said they cleared certain codes just with a new gas cap... Can't remember the code though. :/

Work from the specific code you have. Our Engine Codes are usually pretty good at getting you in the general area and it will beat throwing parts at it until it goes away.

Edit; just re read your initial problems... That REALLY sounds like its a dirty MAF if you are choking it from a stop. I mean there's the TB the IACV and MAF to look at too, it sounds like

 

but what making me crzay is why when i add injectr cleaner it works without any issues... i dotn have any codes..

 

I had the same problem with my 96. The car had a code for the EGR soleniod valve. Got used one for 15 bucks, put it in, reset and runs like new.

 

Same here, bought a new EGR sol valve, put it in and code never came back.
Luckily with me, i just had the code without any performance issues.

 

as i said i changed the egr sol valve, this morning and drove the car alll day the engine light still off , thats nice, and 3 hrs ago changed MAF and no codes, but still when i put it on D and hold the brake pad and push on gas 2 to 3 times with rpm on 2 or 3 then i drive it for a while without it will hesitate you ll see RPM goes down and then back to normal and if u stop and push gas to move it turns of then i turn it on and drive... hint.. it happen when i speed high and then slow down quickly...

 

I took my car to Nissan Ancira (nissan dealer) and this is what they come up with
fuel pressure regulator
Purge control valve
Coils 6 of them

and got this code p1445

total $ 1,600
so i took my car and run lol

if i wanna fix it where i can find these parts (location) and how i can test a use ones like Purge control valve and Coils ?

 

In the FSM, factory service manual. You can find it on the forum just run a search.

 

im confused where is Purge control valve (P1445) is it at the back of the car or it on the engine .. i was ready the forums issues concerning purge volume control and found that some place call it canister purge volume control and other call it purge volume control....

 

it sounds like the dealer was jus gonna try to throw parts at it. U can do the same as well for much cheaper.

I suggest clean your TB, MAF, and IACV. Really sounds like a bad or faulty IACV. Resistance test the IACV per FSM

 

THe hesitation and jumping when you get on the gas after a stop leads me to believe its an IACV issue as well. 30ohms means its good. Lots of IACV problems as of late including mine. THe IACV is fine so its my harness

 

Thanks, i ll try to replace the Iacv i have extra 1..

 

i had the same problem with my 96 i still have my check engine light but then again i have mystery ecu from junk yard since mine caught fire in car. But clean your egr thats what i did and mine had 227k