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

12,745

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 out of 1 people think this is helpful.
175

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 out of 2 people think this is helpful.
40

Check your MAF mass Air Flow meter

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

300ZX

Looking for a Used 300ZX in your area?

CarGurus has 125 nationwide 300ZX listings starting at $3,995.

ZIP:

Search Nissan 300ZX Questions

Nissan 300ZX Experts

#1 Tom Demyan
Tom Demyan
Reputation 440
#2 Jamie Staples
Jamie Staples
Reputation 280
#3 dandyoun
dandyoun
Reputation 240
View All

Related Models For Sale

Used Ford Mustang
397 Great Deals out of 47,365 listings starting at $1,999
Used Toyota Supra
40 listings starting at $47,888
Used Chevrolet Camaro
151 Great Deals out of 32,742 listings starting at $1,729
Used Chevrolet Corvette
98 Great Deals out of 20,444 listings starting at $3,495
Used Mazda RX-7
51 listings
Used BMW 3 Series
969 Great Deals out of 33,695 listings starting at $1,000
Used Nissan 200SX
11 listings
Used BMW M3
39 Great Deals out of 1,702 listings starting at $4,544

Used Cars For Sale

1996 Nissan 300ZX For Sale
9 listings starting at $3,995