1988 300zx, erratic, low idle, dies, backfires, black deposits buildup from exhaust
25

Asked by Whiteside Apr 30, 2012 at 07:30 PM about the 1988 Nissan 300ZX

Question type: Maintenance & Repair

1988 300zx, erratic, low idle, dies, backfires, black deposits buildup from exhaust
check engine light came on and off every now an then, then stays on at all times. started sputtering, has
low erratic idle, backfires sometimes. black discharge buildup above exhaust. dies unless I give it gas.
consuming large quantity of fuel. runs really rich. Replaced cap, rotor, spark plugs, fuel filter, oil change,
problem still persists. Still need to buy spark plug wires. Not quite sure how to narrow the problem
down. -also, tachometer not reading unless car is warm. I rev car and pin barely moves. only over time
it starts working correctly.

3 Answers
2,735

Dan answered 12 years ago

sounds like you're running rich could have bad O2 sensors or pcm problem

Mark helpful
60

wildmanddk answered 12 years ago

I had same issue and the solution was the fuel pressure regulator. The diaphram in the regulator that actuates the pressure control needle valve developed a leak and it was sucking fuel directly into the manifold vacuum line. I replaced the pressure regulator and mileage went up 40%... They're not real expensive and even if it's not the whole problem, it's probably contributing to the 'too rich' condition'...

4 people found this helpful.
Best Answer Mark helpful
25

Whiteside answered 12 years ago

You are absolutely right, I changed that out, and discovered a crack in the vacuum line for the MAS. and shes runnin like a beast again

2 people found this helpful.
Mark helpful

Your Answer:

Related Questions

  • 1988 300zx, erratic, low idle, dies, backfires, black deposits buildup from exhaust 3 Answers

    1988 300zx, erratic, low idle, dies, backfires, black deposits buildup from exhaust check engine light came on and off every now an then, then stays on at all times. started sputtering, has low errat...

    1988 Nissan 300ZX

    -

    Maintenance & Repair

  • 1988 300zx NT, Erratic to low idle, bogs on acceleration, backfires at times 3 Answers

    I have been having this problem with my 1988 300zx non turbo. Check engine light would turn on and off frequently, then stays on. So I changed fuel filter, plugs,cap,and rotor, when I did my oil chan...

    1988 Nissan 300ZX

    -

    Maintenance & Repair

  • Security system; 1988 300ZX 1 Answer

    Will the security system on the '88, 300ZX prevent the car from starting? Mine doesn't start, but the starter is turning fine. The engine will not fire.

    1988 Nissan 300ZX 2 Dr GS 2+2

    -

    Maintenance & Repair

  • Heat from my 1986 300ZX Turbo 3 Answers

    When I drive there's a constant heat coming from the vents of my 1986 300ZX Turbo, even when I don't have the heat selection on. It's not air from outside but heat. R.Butcher

    1986 Nissan 300ZX 2 Dr Turbo

    -

    Maintenance & Repair

  • 85 300zx turns over, but not getting fire from distributor? 2 Answers

    Turns over, but doesn’t start. Strayed gas in throttle body. Didn’t work. Pulled #1 plug wire from distributor, had assistant turn it over. Didn’t see spark from distributor to wire. Any sugges...

    Nissan 300ZX

    -

    Maintenance & Repair

300ZX

Looking for a Used 300ZX in your area?

CarGurus has 5 nationwide 300ZX listings and the tools to find you a great deal.

Postal Code:

Shortcuts

Search Nissan 300ZX Questions

CarGurus Experts

  • #1
    dandyoun
    Reputation
    410
  • #2
    Jamie Staples
    Reputation
    400
  • #3
    macevanscb
    Reputation
    350
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Corvette
26 Great Deals out of 1,005 listings starting at $11,995
Used Ford Mustang
53 Great Deals out of 1,256 listings starting at $4,995
Used Nissan Skyline
1 listing
Used Toyota Supra
4 Great Deals out of 66 listings starting at $49,988
Used BMW 3 Series
76 Great Deals out of 1,183 listings starting at $1,995
Used BMW M3
7 Great Deals out of 96 listings starting at $15,995
Used Porsche 911
10 Great Deals out of 326 listings starting at $20,988
Used Chevrolet Camaro
26 Great Deals out of 347 listings starting at $10,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.