11 replies to this topic

[Shadyfox]

Guys

After the car being of the road for months its finally back together it started up after the fuel pressure was up run ok got up to temperature fans cut etc but at about 2/3000 RPM two of the throttle bodies spit and flame a bit then clears if you rev the engine, the idle seemed a bit lumpy, spoke to Steve and a couple of mates and we all agreed that i may be an air leak so changed the manifold gasket cleaned all the faces replaced gasket, car would not start just kept back firing, then started still with the same problem spitting out of the same two TB,s then stalled, restarted it now the exhaust glows red on one pipe back fires and one cylinder is not firing all plugs and fuel lines had been disconnected for the gasket swap and the the dead cylinder if you take of the injector plug it makes no difference I have also replaced the iridium plugs with new ones.

I'm running TB,s with a hydra II ECU i had seen a post with some one with the same problem could it be that the cam timing has jumped as it can be problem when starting sometimes as the tensioner is hydraulic?

baffled with it just done another 12 hours on it today Im done:(

Tim

[Shadyfox]

I think it's your dropplegama valve playing up

[The Matt]

What sort of bodies are they? Are they in pairs like a Jenvey style or four individuals?

Which two are spitting? Centre two, outer two, left two or right two?

It may just be that thet bodies need balancing.

[ibrooks]

A glowing exhaust suggests that it's running lean. If it's just on one cylinder then look at that cylinder - is the injector blocked? wiring iffy preventing it firing?

Spitting out of the bodies does suggest timing but it can be ignition or cam timing.

There's obviously something or possibly several somethings not right so I'd be going back to first principles and checking everything starting with cam timing.

Iain

[Shadyfox]

What sort of bodies are they? Are they in pairs like a Jenvey style or four individuals?

Which two are spitting? Centre two, outer two, left two or right two?

It may just be that thet bodies need balancing.

They are individual TBs the right two are spitting if your are at the back of the car, just been back to the ware house and tried uplugging the EMS, also noticed the fuel pump very noisy, dont make sense when all I have changed is the inlet gasket.

[Shadyfox]

A glowing exhaust suggests that it's running lean. If it's just on one cylinder then look at that cylinder - is the injector blocked? wiring iffy preventing it firing?

Spitting out of the bodies does suggest timing but it can be ignition or cam timing.

There's obviously something or possibly several somethings not right so I'd be going back to first principles and checking everything starting with cam timing.

Iain

I had heard about the cam timing jumping but this would normally be if the car was pushed back wards in gear with the engine off, the oil pressure is good when trying to start the car the car is on axle stands has been since last June.

Do you have the detail photo of the timing setup?

[Shadyfox]

A glowing exhaust suggests that it's running lean. If it's just on one cylinder then look at that cylinder - is the injector blocked? wiring iffy preventing it firing?

Spitting out of the bodies does suggest timing but it can be ignition or cam timing.

There's obviously something or possibly several somethings not right so I'd be going back to first principles and checking everything starting with cam timing.

Iain

I had heard about the cam timing jumping but this would normally be if the car was pushed back wards in gear with the engine off, the oil pressure is good when trying to start the car the car is on axle stands has been since last June.

Do you have the detail photo of the timing setup?

found the problem it was the fuel pressure, Iain said it was running lean you were right, we had taken the tank out to fit the antiroll bar ,the fuel return pipe on the top of the tank had a cable tie folding the pipe over it looked wrong so we rerouted it. this now turns out was there for a reason, clamped the pipe and the car started straight up no spitting no problem, no fuel pump noise, i will be checking the fuel pressure with a rig as it should be 3 bar, I now think that the regulator on the car is knackerd or needs setting up.

it runs better than it has for months it must have been a problem before I bought the car.

thanks for the help and advise ill let you know what we find with the regulator.

Tim

[cptkirk]

Sounds like your fuel line setup is wrong. can you describe or do a photo run (preferable) of how the fuel line is plumbed with all connections shown, including t-peices. Its odd for a regulator to be wrong.

Edited by cptkirk, 01 February 2012 - 12:19 PM.

[Shadyfox]

Sounds like your fuel line setup is wrong. can you describe or do a photo run (preferable) of how the fuel line is plumbed with all connections shown, including t-peices. Its odd for a regulator to be wrong.

Andy

The regulator hadn't been set up, removed it tonight took it apart cleaned it the rubber is good put it all back together as it was then started the car wound the grub screw in until the pump stopped rattling and it works the fuel pressures up in the system, be it that its running really rich and some huge flames out the pipe, I know its not set up but it works so hopefully tomorrow i can get a pressure gauge on it, I did play a bit with screw and stopped the flames but then the spitting TB,s are back.

Just baffles me that the car looks like it was set up with a cable tie on the return on the top of the tank to restrict the flow to get the back pressure (almost folded in half)

The car i have was the 1st Vtec that Chris built nº98 so since then that has been a lot of development I,m sure most of you have been init as it was the demo and his personal mini.....
I,m not great at getting photos on here but i will try

thanks Tim

[cptkirk]

Tim

The diagram below should be of use to you. I did a quick cad sketch of a standard setup and one of my setup, the only real difference is I dont have the Tee piece in mine but by flowing across the rail I didnt require one.

Obviously the standard setup is what yours should replicate or at least be really close to that, cable tying a fuel line is a real bodge job fix.

If you think it might your FPR that fecked I can recommend the Walbro FPR, they come in different pressure settings. I would suggest once you've sorted your fuelling issue that you get it remapped by a reputable tuner.

Anyhoo, enough rambling heres the diagram:

Edited by cptkirk, 02 February 2012 - 12:51 PM.

[Shadyfox]

Tim

The diagram below should be of use to you. I did a quick cad sketch of a standard setup and one of my setup, the only real difference is I dont have the Tee piece in mine but by flowing across the rail I didnt require one.

Obviously the standard setup is what yours should replicate or at least be really close to that, cable tying a fuel line is a real bodge job fix.

If you think it might your FPR that fecked I can recommend the Walbro FPR, they come in different pressure settings. I would suggest once you've sorted your fuelling issue that you get it remapped by a reputable tuner.

Anyhoo, enough rambling heres the diagram:

mate you are a legend working on the car saturday with a pressure rig ill let you know what the out come is
thanks again

[Shadyfox]

Tim

The diagram below should be of use to you. I did a quick cad sketch of a standard setup and one of my setup, the only real difference is I dont have the Tee piece in mine but by flowing across the rail I didnt require one.

Obviously the standard setup is what yours should replicate or at least be really close to that, cable tying a fuel line is a real bodge job fix.

If you think it might your FPR that fecked I can recommend the Walbro FPR, they come in different pressure settings. I would suggest once you've sorted your fuelling issue that you get it remapped by a reputable tuner.

Anyhoo, enough rambling heres the diagram:

mate you are a legend working on the car saturday with a pressure rig ill let you know what the out come is
thanks again

All seems good now fuel pressure at 3 bar ( was at six ) I changed the plugs again as it was missing put the old ones back in still runs a little rich on tick over but they do bit, then on a high engine rev the pressure drops to 2 bar so I'm fitting an adjustable regulator with a gauge to keep an eye on it i may run at 3.5 bar better to be to rich, drove the car for the 1st time since last summer, I forgot how effin fast they are, will keep you posted...