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Running Issues After Single Turbo Install

d-ranged

By d-ranged,
in Engines & Forced Induction

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d-ranged Enthusiast

d-ranged

Posted
Posted (edited)

So I have finally finished my single turbo install, everything is all plumbed in and i was looking forward to starting the car and hearing it properly.

I turned the car on, the revs went up then dropped and the engine spluttered and cut out. I have had the car running previous to this with the single turbo (to make sure it was all ok, not driven) and it seemed to run fine but i have just recently taken the plenum off to remove some water lines and put it back on and also fitted a catch tank.

If i hold the throttle open it will run, although a bit lumpy and seems that its over fueling alot as its burning my eyes! Once its warmed up a bit it seems to stay on for a little while but start spluttering more and more till it cuts out again

If i pull the map sensor pipe out of its mounting hole (where the old PCV valve was) then the car seems to start idling fine, although a little high. If i put my finger on the hole the map sensor pipe goes into you can feel a strong vacuum and that brings down the revs to a normalish range (around 1k).

The thing with the blue port is where the map sensor plugs into and it screws into that hole

IMG-20131214-WA0000_zpswol7xxcd.jpg

What is weird is that the car is running without the map sensor pipe plumbed in and a lot better than with it plugged in too!!!

A little run down on the plenum refit -

I bought new metal gaskets and sprayed them with hylomar.
Also sprayed the plenum and throttle body faces with it for some extra sealing.
I cant really hear any air leaks but the car is very loud and in the garage.

I am running a Link G4 ECU currently with the map that came with it when i bought it from someone on here. He was running 600cc or 800cc injectors, not sure which.

I am running standard injectors and i have not yet changed the settings on the Link to them so i know that could have something to do with the bad running but would it make the engine splutter and cut out?

I haven't tried spraying the inlets with wd40 yet as it got to late and there are babies next door so didn't want to wake them.

Anyone else have any suggestions? I have checked under the plenum and everything is 100% plumbed in.

*EDIT*

So i plumbed the map sensor back in and changed the dead time settings at 14v as that is what the ECU reads at idle, to what the default map that comes with the Link and it still didn't like it. I had to increase the latency from 9.5 to 1.10 for 14v and the car seems to idle OKish, although the revs keep going up and down every now and then around 200rpm and feels quite lumpy.

I tried using the base map that comes with the Link and the car wont even start! The IAT sensor is reading 100c when i do that and is showing red. I tried messing about with some settings but couldnt get it working so i have to stick to the map that came with my Link at the moment. I am not able to drive the car yet as i still need to bolt the bumper back on and put the clutch slave cylinder back on so dont know how its going to behave with some load through the engine.

Also, i forgot to mention - I don't currently have my wideband (and dont have lambdas) hooked up as i need to get my exhaust flange welded on as the wideband goes in that so the ECU is not getting any wideband readings, the map that came with the Link was setup to read the Wideband sensor that i got with it (PLX Wideband), could this be causing rough idle too? I had thought that you can run without lambdas or a wideband as you can unplug the standard ones with standard ecu and the car still runs?

This is a link to the map I am currently using, if anyone could have a look at it and make some changes if they see anything to get me running a bit better till i can get the exhaust and wideband sorted that would be great. The previous car the Link was in had 600cc injectors and larger cams and a few other bits too, plus was still running twins.

Anyone looking for a map to get your car running then feel free to use this and do what you like with it, as I said, I cant get my car started with the base map! -

Download Map that came with ECU adjusted dead times.pcl from Sendspace.com - send big files the easy way

My current setup -

Precision 6266 Dual Ball Bearing Turbo
6 Boost Manifold
Twin Tial 38mm Wastegates
Stock Cams
Stock Injectors (Will be ordering some 1000cc next month)
Using built in Map sensor on Link

Edited by d-ranged
GTRPSI Mentor

GTRPSI

Posted
Posted

Id say a tuning issue, the new ecu ran with diffrent injectors, possibly fuel pressure too.

Was the other person running a resistor pack with the injectors?

Checked whats setup in the ecu program?

Plemum vacuum lines set up correctly?

Lamba plugged in right?

d-ranged Enthusiast

d-ranged

Posted
  • Author
Posted

Id say a tuning issue, the new ecu ran with diffrent injectors, possibly fuel pressure too.

Was the other person running a resistor pack with the injectors?

Checked whats setup in the ecu program?

Plemum vacuum lines set up correctly?

Lamba plugged in right?

Thanks for the reply.

Im not sure if they were running a resistor pack, think it was HKS 600cc injectors they had.

I have changed the dead times in the ecu and managed to get it to idle OKish

Plenum vac lines all look good.

No, i dont currently have lambdas but have a wideband to go on but cant use that until my exhaust gets it v-band flange welded on so i can bolt it to the downpipe.

Ben C34 Grand Master

Ben C34

Posted
Posted (edited)

You have to get the injector settings in the ecu right.

"What is weird is that the car is running without the map sensor pipe plumbed in and a lot better than with it plugged in too!!!"

that's because the tune is heaps wrong. Maybe it ran fine the first time you tried because the car was colder and the enrichment was enough to get it to run, then next time you ran it for longer and noticed the issue. Changing the dead time only might allow you to get it to idle, but it won't run or drive nicely by doing that.

Edited by superben
d-ranged Enthusiast

d-ranged

Posted
  • Author
Posted

I just tried moving the car out the garage and it cut out. Changed the ignition and fueling settings to the ones that come with the base map and the car started idling alot nicer but when i rev it, it miss fires pretty bad now.

Can someone please send me a base map so i can get the car out the garage so i can get the car taken to the farbricators??? Someone must have one :(

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