1984 Nissan 300zx non turbo jumpy and lagging acceleration


Asked by Mar 29, 2015 at 03:21 PM about the 1984 Nissan 300ZX 2 Dr STD

Question type: Maintenance & Repair

I recently got a 300zx non turbo model. Im having an issue with the acceleration in the
vehicle. When I put my foot on the gas it accelerates no problem, but when I'm going a
constant speed with my foot on the pedal it tend the jump around a bit. It will gain
slight acceleration without changing the pedal position and then drop back to where it
was previously.
I have already replaced my fuel filter and my pump has been tested and is in 100%
working order. There are also no holes in the exhaust the may hinder performance,

Any ideas of what could be causing this?

8 Answers

Check the led code window on ecm it self that will save you a lot of time. These cars have similar problems, but trying to fix them online can turn out bad.


Well, I took a look at the ecm, but it doesnt appear to have an led window on it. Any other ideas?

Xenonzcar/FSM has a zipped file that contains all factory service repairs and trouble shooting.

Its free and there are several 300zx pages on Fb DO YOUR HOME WORK BEFORE ASKING A QUESTION, OR BRING YOUR FIRE SUIT.


Well I did my research, I just always prefer a second opinion on things. Thanks for the help though!

Was just trying to look out there are some real trolls on the fb pages is what I was saying


Ah i get ya. Well thank you. You actually did help alot!


If you need the pdf I can send it to you. Had the same problem with mine it ended up being a broken wire on the fuel pump relay. It was getting voltage but the correct amount. Its green located on passenger side behind the battery

Your Answer:


Looking for a Used 300ZX in your area?

CarGurus has 147 nationwide 300ZX listings starting at $5,500.


Nissan 300ZX Experts

  • #1
    Tom Demyan
  • #2
    Jamie Staples
  • #3
View All

Related Models For Sale

Used Chevrolet Corvette
79 Great Deals out of 15,067 listings starting at $3,700
Used Ford Mustang
297 Great Deals out of 39,759 listings starting at $1,312
Used Chevrolet Camaro
242 Great Deals out of 26,934 listings starting at $2,900
Used Porsche 911
68 Great Deals out of 4,565 listings starting at $11,000
Used Dodge Challenger
186 Great Deals out of 23,476 listings starting at $7,495
Used Toyota Supra
53 listings

Used Cars For Sale

1996 Nissan 300ZX For Sale
14 listings starting at $6,490
1993 Nissan 300ZX For Sale
18 listings starting at $6,000

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.