Jump to content
SAU Community

Crazy Idle Surging When Engine Warm

Guest INASNT

By Guest INASNT,
in General Automotive Discussion

 Share

Recommended Posts

Guest INASNT

Guest INASNT

Posted
Posted

This idle situation is really starting to piss me off!

After putting in 550cc injectors, 044 pump, pfc, new clutch and flywheel i am getting this weird idle when the car is warm.

The idle surges from around 2000rpm to 500rpm up and down for about 30 seconds and then stalls. When i restart the car the idle stabilizers for about 5 minutes and then it will do it again.

I checked the z32afm plug, the afm it self and cleaned the idle control plugs but to no luck.

What else could be causing this??

Link to comment
https://www.sau.com.au/forums/topic/25262-crazy-idle-surging-when-engine-warm/
Share on other sites
B-Man Grand Master

B-Man

Posted
Posted

Sounds to me like a dodgy AFM - Have you got another one or stock one you can try as a test ?

Did you check all your wiring after you found that other problem when were swapping PFCs etc ?

Al Grand Master

Al

Posted
Posted

Sounds like you need to tune the PFC a little more. The mixtures could be too rich or even lean. Take it back to your tunner and tell them to play with the idle a little.

My Wolf 3D was surging/hunting and also stalled, the first time i got it back from the tune. Went back to EAS and within 10 mins it was perrr ing :D.

Guest INASNT

Guest INASNT

Posted
Posted
Originally posted by MicK51

Did u get a lightened flywheel?  They can cause a lumpy idle.

yes but it aint that as it come and goes, and when i turn the ac on the idle will stablise abit but then start to do stupid again.

I think its either the z32 afm playing up or a vacuum leak somewhere!

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

    • ARB26
      RB26DETT Sketchy boost mod?

      By ARB26 · Posted

      So could it be assumed it has been installed intentionally with potentially a power FC boost controller kit? 
    • Gareth87
      What should I do next to hold the head on

      By Gareth87 · Posted

      Had my rig on Matt's dyno at PITS the other day. After a few years between tunes I added a few sensors and swapped intercoolers. Result. 553hp at 26psi. Not bad for an FJ20 that was built in 2007. The problem.. It filled the overflow bottle on hard runs which leads me to believe the head gasket isn't sealing. I have a coolant pressure sensor which was reading cap pressure at 22psi and occasionally overrunning to 23/24 psi on deceleration after a pull. It was not spiking. It has arp2000 head studs and a cometic gasket. As its been 18 years in service, I pulled the engine out and head off. Everything looks good but we obviously have an issue. Where I'm at.. Years ago I had the same issue, I checked the stud tension and they were all over the place. Some at 60 to 70 and some up near 90. I nipped them all to 100ft lbs and this stopped the water push until now. I believe this compromised the gasket back then. What do I do? 2 options are..  1) I bought arp 625+s, which I could put in with a new gasket. Thinking Kameari this time, reassemble and try again. 2) strip the block, get fire rings machined in with copper gasket and try that. I do not want to push it more than 28 to 30psi. I think the turbo will be out by then anyway. (G30-770). My other concern is the long term ability of a copper head gasket. Are they streetable for years? I feel like a new gasket with the new studs will probably suffice, but I don't know. Any thoughts welcome and advice on copper gaskets and fire rings. Thanks!
    • MBS206
      Chris' Toyota Mark ii JZX110

      By MBS206 · Posted

      I'm a fan of the JZX110, and the Aristo. Big cruiser cars, and with the factory cars, super comfortable and feel like you're driving an armchair! And the JZ motors are a pretty nice engine too, especially with some basic mods.   The import process, and the need to be able to trust people, and the fact there's so many scammers around is what ever puts me off wanting to go through that ordeal!
    • GTSBoy
      Chris' Toyota Mark ii JZX110

      By GTSBoy · Posted

      I don't care for these at all, but at least the underside looks straight and not rusty. A good basis for a long life. Many cars from Japan have been lifted with forklifts and f**ked almost irrepairably.
    • GTSBoy
      RB26DETT Sketchy boost mod?

      By GTSBoy · Posted

      Yes, but it's not dumb or dodgy. You can build a perfectly good boost controller from a pressure reg, a relief valve (looks same same as a reg if all from Norgren or SMC, for example) and a check valve. I ran one for years. Only superceded with  EBC because I could get one for cheaps and wanted finer control.   THis mod is certainly not a sketchy boost mod, provided the boost is kept below the "spin to death" threshold of the turbos.
×
×
  • Create New...