Jump to content
SAU Community

R33 Problem

Nige1

By Nige1,
in Engines & Forced Induction

 Share

Recommended Posts

Nige1 Enthusiast

Nige1

Posted
Posted

I have an r33 skyline 1994, it has a bad case of backfire, it has very poor acceleration and when i accelerate it gets stuck at 3 rpm backfiring really bad, i have check spark plugs, fuel filter, coils, afm, vacuum leaks, i have cleaned throttle body, afm, aac valve ive had a mechanic check it he cldnt find problem, its undrivable and check engine lights on, timing strts up at 20 on strt up and slowly decreases to 15 as car warms up. Mods are

Splitfire coils.

550cc fuel pump.

3 inch turbo bAck exhaust

High flow turbo

Apexi pod filter

Apexi fc commander

Boost Gauge

Front intercooler

Boost controller

Lowered 1.5 inchs

Short shift gear box

What di you guys think

Link to comment
https://www.sau.com.au/forums/topic/421517-r33-problem/
Share on other sites
jjman Mentor

jjman

Posted
Posted (edited)

Even though you have splitfires in there it sounds like textbook coilpacks.

Try some other known working coilpacks in it.

Otherwise you say you have only 'checked' sparkplugs and 'cleaned' the AFM.

Id go for changing spark plugs to the tried and tested bcpr7es .8 gap. Also 'check' that you dont have a dry solder on your afm or some other problem/damage in it.

That timing seems normal but otherwise when was the last time it was tuned/ PFC checked?

good luck. Nothing worse than a case of the missfires/backfires.

Edited by jjman
Link to comment
https://www.sau.com.au/forums/topic/421517-r33-problem/#findComment-6780712
Share on other sites
Nige1 Enthusiast

Nige1

Posted
  • Author
Posted

I changed sparkplugs to those ones clned maf the joints look fine but it could be i unplug maf while car was running it stalled strted it up with maf unplugged idled shit we tested coils by unpluging one at a time while car was running

Link to comment
https://www.sau.com.au/forums/topic/421517-r33-problem/#findComment-6780751
Share on other sites
Jayden.K Collaborator

Jayden.K

Posted
Posted

mate it seems at peak boost is when your problem is, has to be either afm or coils/plugs. very sure of it. i put to much oil on my air filter once and when it hit boost at around 2600rpm it hit a wall, point being afm wasnt reading correctly. and coil packs bring on the engine light. on standard computers anyway not to sure about pfc in how it stores trouble codes if it has any

Link to comment
https://www.sau.com.au/forums/topic/421517-r33-problem/#findComment-6781099
Share on other sites

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • RP1421
      S15 Spec R

      By RP1421 · Posted

      As discussed in the previous post, the bushes in the 110 needed replacing. I took this opportunity to replace the castor bushes, the front lower control arm, lower the car and get the alignment dialled in with new tyres. I took it down to Alignment Motorsports on the GC to get this work done and also get more out of the Shockworks as I felt like I wasn't getting the full use out of them.  To cut a very long story short, it ended up being the case the passenger side castor arm wouldn't accept the brand new bush as the sleeve had worn badly enough to the point you could push the new bush in by hand and completely through. Trying a pair of TRD bushes didn't fix the issue either (I had originally gone with Hardrace bushes). We needed to urgently source another castor arm, and thankfully this was sourced and the guys at the shop worked on my car until 7pm on a Saturday to get everything done. The car rides a lot nicer now with the suspension dialled in properly. Lowered the car a little as well to suit the lower profile front tyres, and just bring the car down generally. Eternally thankful for the guys down at the shop to get the car sorted, we both pulled big favours from our contacts to get it done on the Saturday.  Also plugged in the new Stedi foglights into the S15, and even from a quick test in the garage I'm keen to see how they look out on the road. I had some concerns about the length of the LED body and whether it'd fit in the foglight housing but it's fine.  I've got a small window coming up next month where I'll likely get a little paint work done on the 110 to remove the rear wing, add a boot wing and roof wing, get the side skirt fixed up and colour match the little panel on the tail lights so that I can install some badges that I've kept in storage. I'm also tempted to put in a new pair of headlights on the 110.  Until then, here's some more pictures from Easter this year. 
    • joshuaho96
      R32 GTS (RB20DE) Injectors Replacement

      By joshuaho96 · Posted

      I would put a fuel pressure gauge between the filter and the fuel rail, see if it's maintaining good fuel pressure at idle going up to the point when it stalls. Do you see any strange behavior in commanded fuel leading up to the point when it stalls? You might have to start going through the service manual and doing a long list of sensor tests if it's not the fuel system for whatever reason.
    • perry_r33
      R34 GTR Vspec Garage Sale - All must go!

      By perry_r33 · Posted

      Pm sent 
    • Robot
      Skyline v36 350GT sedan hunting on idle

      By Robot · Posted

      Hi,  Just joined the forum so I could share my "fix" of this problem. Might be of use to someone. Had the same hunting at idle issue on my V36 with VQ35HR engine after swapping the engine because the original one got overheated.  While changing the engine I made the mistake of cleaning the throttle bodies and tried all the tricks i could find to do a throttle relearn with no luck. Gave in and took it to a shop and they couldn't sort it. Then took it to my local Nissan dealership and they couldn't get it to idle properly. They said I'd need to replace the throttle bodies and the ecu probably costing more than the car is worth. So I had the idea of replacing the carbon I cleaned out with a thin layer of super glue and it's back to normal idle now. Bit rough but saved the car from the wreckers 🤣
    • GabsReDeal
      R32 GTS (RB20DE) Injectors Replacement

      By GabsReDeal · Posted

      After my last update, I went ahead with cleaning and restoring the entire fuel system. This included removing the tank and cleaning it with the Beyond Balistics solution, power washing it multiple times, drying it thoroughly, rinsing with IPA, drying again with heat gun and compressed air. Also, cleaning out the lines, fuel rail, and replacing the fuel pump with an OEM-style one. During the cleaning process, I replaced several hoses - including the breather hose on the fuel tank, which turned out to be the cause of the earlier fuel leak. This is what the old fuel filter looked like: Fuel tank before cleaning: Dirty Fuel Tank.mp4   Fuel tank after cleaning (some staining remains): Clean Fuel Tank.mp4 Both the OEM 270cc and new DeatschWerks 550cc injectors were cleaned professionally by a shop. Before reassembling everything, I tested the fuel flow by running the pump output into a container at the fuel filter location - flow looked good. I then fitted the new fuel filter and reassembled the rest of the system. Fuel Flow Test.mp4 Test 1 - 550cc injectors Ran the new fuel pump with its supplied diagonal strainer (different from OEM’s flat strainer) and my 550cc injectors using the same resized-injector map I had successfully used before. At first, it idled roughly and stalled when I applied throttle. Checked the spark plugs and found that they were fouled with carbon (likely from the earlier overly rich running when the injectors were clogged). After cleaning the plugs, the car started fine. However, it would only idle for 30–60 seconds before stalling, and while driving it would feel like a “fuel cut” after a few seconds - though it wouldn’t fully stall. Test 2 – Strainer swap Suspecting the diagonal strainer might not be reaching the tank bottom, I swapped it for the original flat strainer and filled the tank with ~45L of fuel. The issue persisted exactly the same. Test 3 – OEM injectors To eliminate tuning variables, I reinstalled the OEM 270cc injectors and reverted to the original map. Cleaned the spark plugs again just in-case. The stalling and “fuel cut” still remained.   At this stage, I suspect an intermittent power or connection fault at the fuel pump hanger, caused during the cleaning process. This has led me to look into getting Frenchy’s fuel hanger and replacing the unit entirely. TL;DR: Cleaned and restored the fuel system (tank, lines, rail, pump). Tested 550cc injectors with the same resized-injector map as before, but the car stalls at idle and experiences what feels like “fuel cut” after a few seconds of driving. Swapped back to OEM injectors with original map to rule out tuning, but the issue persists. Now suspecting an intermittent power or connection fault at the fuel pump hanger, possibly cause by the cleaning process.  
×
×
  • Create New...