R33 Gtst Is Still Surging Help!

[Stormchaser]

Ok so about 6 months ago I noticed my car would severly surge as if the engine would die then right itself then die again, more so when I would try to accelerate out of it. It did this once and then it went away. Thought it might have been a bit of bad fuel.

About a week later I was driving on a back road to my mates place( I live in a rural area and the roads are really bad and bumpy) and it started doing it again, this time it stayed and it was almost impossible to drive it. Ended up leaving it overnight at his place and drove it back still playing up. It had also developed a terrible miss at idle.

I took out the idirium plugs and replaced the coils with a few secondhand ones as I didnt have $500+ to spend on splitfires if it wasn't going to fix it.

After installing them I took it for a drive up and down my street only( car was unregistered at this time) for a few full throttle runs and it seemed fine no more miss at idle, no more surging seemed all good.

I decided that seeing as it was out of rego and I didnt have the money to get it regoed I took it off the road and did a full service+ clutch, alloy rad, timing belt kit.

Drove it for a day after regoing and the car seemed perfect, untill the surging happened again. Its weird, only at light throttle and very intermittent. So I sent the car to a workshop and they said that It had dirty fuel in the rail and that it sitting for 6 months with the same fuel in could be the problem. Did an oncar flush got car back and it seemed fine untill back again I thought it might go away but I decided to drive it a bit more to induce it. It didnt happen again, I have been driving for about 4 days and tonight it started it again.

I drove from my house to Campbelltown in NSW about 50kms perfectly no a problem apart from a slight miss at idle(thought it might be 02 sensor).

The car then sat at the mall for about 3.5 hours and when I drove home it started again.

The drive home is pretty flat and at times I had it in the brakdown lane doing 60ks and it would lurch forward then find power then lurch again.

Im going to get the fuel pressure tested tomorrow and see what I can find. Hoping it the fuel pump.

Any ideas on where to go from here?

Really sorry for the NOVEL just wanted to get it all down.

This forum has helped me countless times, hoping maybe one more.

[Stormchaser]

19 views and not one reply! Cmon! somone has to have had this happen before!

This is really frustrating!

[Scottie]

First thing i'd do is check the fault codes. Than check the fuel presure i'd buy a fuel presure gauge and tap into it and check the presure when its playing up might be a faulty fuel pump or bad fuel reg.

[ArBe20]

Is the surging at idle? If so clean your AAC valve with carby cleaner.

[R338OY]

You can have the fuel pressure tested in 30 seconds at a mechanic/tuner (i'd go/have gone to a tuner for this)

That will narrow it down. It's common for stock pumps to die after 10 years.

If it's the issue then they'll give you some pointers on what to do. That's why i'd go a tuner, not a mech, because a tuner will know how to tackle a Skyline better.

[Stormchaser]

First thing i'd do is check the fault codes. Than check the fuel presure i'd buy a fuel presure gauge and tap into it and check the presure when its playing up might be a faulty fuel pump or bad fuel reg.

I decided to check some other Skyline forums seeing as no one in AUS had simillar problems.

This is what I came up with from a site in the UK

Hope some one can help! Took my skyline out on a long drive today from bristol to Bournemouth. The car was perfect on the way down but on the way home strange things started to happen... Its quite hard to describe but it kept loosing power when i put the throttle down, it was really juddery and kangarooed down the road a lot. It would then go away as long as i didnt drive it up big hills or push the car past 3000rpm. It gradually got worse and then wouldn't even rev over 2000rpm while parked up!! I had a look under the hood and smelt a hot burning smell!

fast forward about 2 pages of replies and volia!

Update on thread! turned out to be the AFM! Was the doggy internal solder joints.

Gave the coils pack and plugs a good clean also.

Checked fault codes, came up with code 55 all good!

Getting fuel pressure checked tomorrow but will probably chuck a pump in at the same time just to be sure.

I have heard mixed results with the walbro pump so is there another option around the same price? Bosch 044 maybe?

Is the surging at idle? If so clean your AAC valve with carby cleaner.

The car would hunt, as in would rev up then drop down the rev up by itself when I got it, did the AAC cleanout and hasn't returned since.

If it's the issue then they'll give you some pointers on what to do. That's why i'd go a tuner, not a mech, because a tuner will know how to tackle a Skyline better.

The place im taking it to work on modified cars they just cant actually tune them as they dont have the software for any of the systems and seeing as where I live is such a small place it would cost a fortune to get them all for a small amount of return profit.

Hopefully they get the Haltech distrubition contract they are looking at.

So after yet another NOVEL sized post I'll update the skylines progress. They said that they would check out the AFM's solder joints and get back to me (so it may look like I need to buy one).

Didnt get a chance to ring them as I had to work but will go and see tomorrow.

Cheers for all the replies!

Jason.

Edited April 10, 2008 by Stormchaser

[Stormchaser]

bump