Jump to content
SAU Community

Recommended Posts

Hey all,

Just got a 91 R32 GTS4 on the road last week, and having issues with breaking up. Im going to list the mods, the symptoms, what i have done to try and fix, and where its gotten me. Thanks to all the contributors the the board for the info thus far.

I got the car a few weeks ago, but have no way of contacting the owner. I bought it through a 3rd party.

Rb20DET GTS4
Automatic Tranny

HKS SSBOV
HKS Pod filter (ripped rubber)
Test Pipe
3" Exhaust
Some kind of replacement coil loom (looks like wiring spec)
Stock Turbo??

-Car breaks up above 40% throttle. If i ease into it, itll pull until about 5000RPM. Cruising at highway speeds, the exhaust had a steady tone, with a faint pop every second or so. Gas Mileage is bad, but i also dont know how these cars drink gas when driving "spiritedly".
-Hicas light comes on, after a few miles of driving. I checked the PS Fluid level, and it seemed ok. The car definitely needs an alignment though, as the wheel isn't completely straight while cruising. Going to get new tires, then have an alignment done.

Popping the hood, reveals a removed spark plug cover. The ingnitor is "mounted" to the firewall with zip ties. 3 of the 6 stock coils had heavy heavy build up on the contact points. The plugs looks black, but not terrible.

I replaced the plugs with NGK Bpr6-11. Didnt change gap (probably will go to .08 when i install the new coilpacks.)
-This made the car run "different", not def better or worse. just different.

I ordered a new complete set of Coilpacks. While i understand that probably only some of them are toasted, i figured on a 25 year old car it worth replacing them all. The packs on the car still say Nissan on them. I have no way of knowing for sure, but logic tells me at some point the previous owner bought a new set of performance coilpacks with a loom. They discarded their stock loom. When selling the car, they reinstalled the stock coilpacks, but left the new loom in because the old one was gone. The spark plug cover is in the trunk. Half of the bolts for the coilpacks are missing, some only have 2 bolts holding the pack on. None of them have all 4 bolts. All the hardware for the plug cover is gone. (the cover is in the trunk however).
-Will put in the new coilpacks, and reinstall the cover and mount the ignitor to the top of the cover. I bought new hardware from local store to remount everything

The HKS Pod filter has a large tear in the rubber part behind the filter, but before the entrance to the maf. When i give it throttle, i can hear the air being sucked into the small gap. Different sound than typical....sounds like a suction through a straw.
-Will buy a new pod filter. Will probably try and duct tape the gap in the one i have now, to see if it will help. Obviously, this is not a fix, just more of a test.

The previous owner, at some point, had a different kind of MAF in the car. I know this because they added a 2nd plug to the harness, but never removed the original plug. They pretty much Tee'd into the harness, and made it so a different MAF can simply be plugged in.
-Will, carefully, open up the harness by the MAF and remove the 2nd plug. Solder and heat shrink everything. Im sure that having the 2nd plug there is creating a decent amount of interference and noise for the ecu to have to deal with. Adapter plugs are cheap enough now, that if i ever need to switch to a Z32 or whatever, i can simply do that.

If these corrections do not fix the issue, i will move onto installing a relay for the fuel pump and getting a new fuel filter. I will probably get a new fuel filter anyway, to just know its been done.

Any tips or suggestions are welcome. Thanks ya'll

Gap plugs down to 0.8 first and see if that helps. Replace the torn pod. Pop the cover off the afm and check the solder joins, they often go dry or crack, re soldering usually fixes that. Try all that and report back. Hope it turns out to be a simple fix.

  • Like 1

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Thanks for doing that Duncan! Makes you a good person in my books. We don't get kangaroos or wombats here. But we have bats and it's similar. AFAIK it's often the mums with a baby attached that get hit because they drop lower when starting from a tree. If you hit an animal, check on it. https://www.ifaw.org/au/resources/wildlife-rescue-app An app to get the closest wildlife rescue contact.
    • My dream is also to have a proper hoist, but I don't think it will ever happen. My quickjack is probably as close as I'll ever get, it really is very good though. 
    • Yeah we keep on in the dailies, it is pretty poor how many animals get hit and the driver leaves without checking....have saved a couple of little ones over the years. Bit of a gruesome job though, pouches generally need to be cut open because they are so tight and often the joey doesn't realise mum is gone so they are still locked onto the teat. I checked the modules in front of the DS wheel where an oil cooler should go.... There is the radar unit - that can go for race use) One of the 2 HX water pumps, the silver cylinder. That needs to be kept but might be able to be relocated But the bad news, the big computer mounted vertically in front of the wheel (blocking any potential air exit) is the electric steering computer. That is required until/unless i do a hydraulic steering conversion, and in CAD based modern car design it is not like I can just pop a big unit like that somewhere else (plus the loom would be too short anywhere else too). So, the passenger side is OK to clear out (just use a smaller washer reservoir, potentially elsewhere), but the DS no beuno
    • Well, all the best with the new camry It was interesting to hear about the UK process, it is generally a lot more streamlined here with a shipping agent looking after all the import side (noting the exact final price can still be a surprise.....) and I've used a few different brokers on the japan (or US) side, and never had any trouble with any of them....luck of the draw I guess. You mentioned you didn't get the auction sheet (understandable since you bought it from a dealer, not auction), but I always try and get hold of that because they are pretty thorough. I've imported 2x R grade vehicles over the years and both were fine, repairs in Japan are pretty thorough compared to here in Oz.
    • BTW I measured the jack I have, it is 70mm at the saddle but you only have about 700 until it returns to 150mm high at the cylinder so it is good but no magic bullet.
×
×
  • Create New...