This POS is DOG!!

[Fawk Awph]

i just got an 89 pickup, ex cab, 5 speed 4x4 with 30x9.5 A/T tires. its basically bone stock. its got the v6 engine. it is by far that slowest truck i have ever driven. and i own a 300 6 cylinder with 35s( 0-60 is about 18 seconds) i dont think the truck could even do it under 20 sec.....the nissan seems to have some serious issues, and i dont know wtf it is. first off, quarter throttle, and full throttle do not seem to be any different. i can push it to the floor or leave it at normal daily driving throttle, and it doesnt not have a difference. second, at about 2000 rpm it seems to lose power. it will barely pull itself along at 75mph. third, if i push the pedal to the floor, and left off real quick, you know, just a quick rev. it will stay for about a second at the peak rpm you rev it to. makes for a bitch when shifting at a higher rpm, its like it sticks there for a second.

heres my question: anyone know wtf is wrong with it? it has had a full tune up, new everything. it does have 163000 miles on it though. i know nothing about this truck other than its slower that hell for being a v6. i believe it is efi. honestly it feel to me like the timing advance is not working. it pings at lower rpm, and wants to lose power at high rpm. and especially under load. it is the origional timing belt/chain. that may be the problem too. also i get about 100 miles to a tank. is that normal city milage?

hey, go ahead and move this over to the noob forum if you like, but i thought that someone here would be my best be for an answer.

thanks if you can help.

this is my first forgien truck, and im not impressed so far. but maybe there is something wrong.

[TRed]

Check your compression.

[MrRatty]

This sounds just like my problem i had with my 4 cyl. I tried everything i knew of, and it was still a POS.
Until i unplugged the ECC under the seat, then it ran normal (for a 4 cyl)

If you do have EFI, then i wouldnt know.
Just a thought

[Fawk Awph]

what is the EEC?

its the throttle body kinda of injection. injected throught an intake manifold, not directly intot he cylinder. its actually runng a little better the more i drive it. i also put some of that synthetic highmilage blend motor oil and it seems to have done some good as well. to find out, the gas that was in it was about a year old, so i think as soon as i get all that burned up it will run better too. im also going to go and buy some od that resore stuff, wtf, who cares if it doesnt work....its not that expensive to just try.

[MrRatty]

Originally posted by Fawk Awph
what is the EEC?
(edit)
im also going to go and buy some od that resore stuff, wtf, who cares if it doesnt work....its not that expensive to just try.

ECC means electronically controlled carburator. But like I said, if you do have fuel injection, then thats not the problem.

As for the "Restore" oil additive, I think it works fine.
Just dont use "Slick 50" From what i hear, slick 50 is an engine eater.
But, I have never used it, so i dont know that for a fact.

good luck

[Fawk Awph]

ok ok, please expand on the unplugging of this EEC, or resetting it, or gettinga new one. i believe this is the problem. in the top of the air cleaner assembly there are the letters E and C, so ya. please expand on how i go about this. i would like to try this.

thanks

[MrRatty]

Originally posted by Fawk Awph
ok ok, please expand on the unplugging of this EEC, or resetting it, or gettinga new one. i believe this is the problem. in the top of the air cleaner assembly there are the letters E and C, so ya. please expand on how i go about this. i would like to try this.

thanks

Well, first off, if you have EFI, then you cant unplug the ECC, (you wont have an ECC)

Please be sure which system you have first, Carbed or Injection

Secondly, If you do have a carbed engine, the ECC is a circuit board incased in a black metal box, under one of your seats. Mine was under the drivers seat, but some are under the pass.

MINE had two multi-wire plugs. I unplugged both, and lost all idle, then i plugged just the front one in, and i got idle back, without the power loss. I did it the other way (front out, rear in), and lost all power and idle. So i went back to front set plugged in, rear set unplugged, and it runs normal now.

LET ME CAUTION YOU NOW !!! I dont think it would be wise to switch the plug positions !!!! (front set of wires, in the rear plug hole or vice versa) Im not sure what would happen, but I dont want to hear your truck burned like a torch

Thats the best way I can explain what i did.

I hope this helps, even a little

[System-f]

I believe that model V-6 was the throttle body injection. You cannot unplug the electronic carb because there isn't one. It will look like you have a carb but it's acutally a throttle body fuel injection similar to Chevy's early EFI setup..

Put some new gas in it, that motor is not a fire breather but it's tough and should push that rig along fine..

[fledgling666]

it's possible it could need a new Mass Airflow Sensor.

[onlyonedr]

Might just need to clean the MAF. Someone on another Nissan board cleaned his out and got mucho power back, I will try to find that link for you.

[Fawk Awph]

how do i clean this thing, im intresed in trying to do this. everyday i drive it it gets better, it sat fo several years, so, i dunno, maybe it just need to be ran. but im still intrested in trying to clean the MAF.

[System-f]

I am not 100% sure but the mass air flow sensor should be in the throttle body..not as easy to clean as the non throttle bodied trucks. I would open take off the aircleaner, open the throttle and look down the bore, if you see a wire mesh lookin thing down there..that's the MAF sensor..if it's dirty, that's your problem

[Fawk Awph]

thanks, ill check that out later today. i need a break form school....holy shit, midterms suck...

thanks

[onlyonedr]

Finally remembered to search for this:

http://nissan4wheelers.com/eve/ubb.x...535#7546012535

Hope that helps you out. Glad to hear the truck is starting to run better.

[System-f]

Chris, most of the pre 90s models were TBI, and my 86.5 TBI hard body had the Mass air flow actually below the throttle plate on the TBI...nothing like that.. was a cool setup but a pain to clean as you had to remove the tbi.

There always is the option of going to the boat shop and getting some de-carb, run that crap through the motor...that will clean it out

[wd212dr]

Originally Posted by Fawk Awph

to find out, the gas that was in it was about a year old, so i think as soon as i get all that burned up it will run better too.

Sheesh... been sitting for a while... I wonder WHY it may run like that... Before doing all this EEC, MAS, etc stuff I would run through a couple FRESH tanks of gas with some EFI cleaner added to each tank and change the fuel filter first... but that is just me...

You probably have some nasty stuff in that fuel system that needs to be worked out before doing any major troubleshooting... No sense chasing ghosts...

[D-RAT]

Keep changing the oil too if you're buring the crap out.

[88pathoffroad]

And probably the fuel filter, if you're filtering old gas. The bottom of the tank might have sediment in it. Post back if you're still having this problem, I have the exact same setup and it's being worked on as we speak.

By the way, that timing belt is supposed to be replaced every 60,000 miles. If it breaks while you're driving it, kiss about 6 of your valves goodbye and start looking for a new engine.