Rough running, ECU & Wire Harness

Asked by Aug 15, 2012 at 12:38 AM about the 1986 Nissan 300ZX Base

Question type: Maintenance & Repair

My 300ZX began running VERY rough (car shaking), would not go past idle and would then shut down. Pressing the accelerator pedal had no effect. The shop, after testing it advised my that I need a new ECU AND wire harness. (I had a similar problem a few moths ago which was traced to an air mass sensor)
Is this type of problem indicative of a bad ECU and Wire Harness?  Is it worth repairing? (I was quoted $1,600.00 for labor and if I can get the parts they would be about $1,000.00. ) (the car has about 340K miles on it)  Thanks.

3 Answers

14,105

With that many miles I would be cautious putting that kind of money into it. The problem could be an ECU and or wire harness. When vehicles get this old wire connectors and connections start to corrode and give problems. This might be why he is talking wire harness.

1 people found this helpful.
185

I have a similar problem on my 1990 TT but it only happens after I drive around for about 20 minutes so I was told it could be the coils or the gas pump...your car is probably a different issue since it does it all the time...I am probly binging it to th eguy who rbuilt my engine since he knows these cars very well and will avoid me from spending money on ramdom things....on e advise I can give you is that these car are so old that you dont spent money on them by the book value but becasu eyou love these cars like I do....These cars are timeless classics and when I drive mines around I turn more heads then any of the new cars right now...plus they are super fun to drive when they are running how they should.

2 people found this helpful.
40

Check your MAF mass Air Flow meter

1 people found this helpful.

Your Answer:

300ZX

Looking for a Used 300ZX in your area?

CarGurus has 139 nationwide 300ZX listings starting at $5,500.

ZIP:

Nissan 300ZX Experts

  • #1
    Tom Demyan
    Reputation
    470
  • #2
    Jamie Staples
    Reputation
    320
  • #3
    dandyoun
    Reputation
    250
View All

Related Models For Sale

Used Chevrolet Corvette
82 Great Deals out of 15,086 listings starting at $3,700
Used Chevrolet Camaro
233 Great Deals out of 26,932 listings starting at $4,000
Used Ford Mustang
317 Great Deals out of 38,105 listings starting at $1,312
Used Porsche 911
73 Great Deals out of 4,577 listings starting at $11,000
Used BMW M3
16 Great Deals out of 1,500 listings starting at $4,995
Used Toyota Supra
56 listings
Used Nissan Skyline
3 listings

Used Cars For Sale

1996 Nissan 300ZX For Sale
15 listings starting at $5,990
1993 Nissan 300ZX For Sale
17 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.