Club G40 Forum

Technical => Engine and Transmission => Topic started by: jooshy63 on May 08, 2011, 05:01:27 PM

Title: GT to G40 swap, problems continuing...
Post by: jooshy63 on May 08, 2011, 05:01:27 PM
Alright guys, in need of some help please.
Just finished swapping the G40 into the GT, all wires are connected but there's no spark and no fuel pump going on turn over. The fuel pumps the GT one, haven't swapped them over and I have no idea why there's no spark. Any help would be much appreciated as I need it back on the road for tomorrow.
Cheers, Josh.
Title: Re: GT to G40 swap, no spark or fuel
Post by: samg40 on May 08, 2011, 10:17:55 PM
Try swapping the plug into the coil around with the plug that will be next to it that plugs into another plug (if that makes sense). If they are the wrong way round it wont start, this has happened many times before.
Title: Re: GT to G40 swap, no spark or fuel
Post by: DKnight on May 09, 2011, 07:56:11 AM
also did you put the wiring in with a replacement fuse box too? check the plugs in the back are all fitted correctly, ive seen the same problem where they are not in right causing this same issue.
Title: Re: GT to G40 swap, no spark or fuel
Post by: jooshy63 on May 09, 2011, 04:20:27 PM
Now sorted, thanks guys, new problem though.
Had to replace the dizzy off the GT on to the G40, car starts fine but sounds like an absolute tractor and running rough as anything. Any answers?
Title: Re: GT to G40 swap, no spark or fuel
Post by: PeteG40 on May 09, 2011, 04:51:26 PM
do the ignition timing? has it been set?
Title: Re: GT to G40 swap, no spark or fuel
Post by: jooshy63 on May 10, 2011, 11:02:53 AM
Yep, cheers again Pete, it was the timing, only problem now is, the oil pressure light is on a constant flash and a small oil leak coming from the oil return on the charger?
May have also possibly tightened the bolt up to much as it's not threading properly, so I'm after a either a new one, or a slightly longer one?
Title: Re: GT to G40 swap, no spark or fuel
Post by: hayesey on May 10, 2011, 11:50:58 AM
you'll have stripped the thread in the soft aluminium charger casing, it'll have to be helicoiled :(

Title: Re: GT to G40 swap, no spark or fuel
Post by: PeteG40 on May 10, 2011, 12:28:42 PM
yeah probably. Agree with mr hayes.

Its an m10 fine pitch and you'll need to be very careful you dont get swarf down the hole or it'll go straight into your charger bearings.  Ideally you'd do it with the charger apart and bearings out.
Title: Re: GT to G40 swap, no spark or fuel
Post by: jooshy63 on May 10, 2011, 01:57:25 PM
Ahhh great  :-\
So you guys reckon this could be why the oil lights flashing?
Title: Re: GT to G40 swap, no spark or fuel
Post by: hayesey on May 10, 2011, 02:05:12 PM
doubt it, more likely a dodgy oil pressure sensor or the sensors connected the wrong way round
Title: Re: GT to G40 swap, no spark or fuel
Post by: PeteG40 on May 10, 2011, 03:53:18 PM
check you've got the copper washers on the banjo of the feed - one on each side too
Title: Re: GT to G40 swap, no spark or fuel
Post by: jooshy63 on May 12, 2011, 02:15:11 PM
So I've had a look at the thread and there's still a good couple of 2mm left of the thread. I'm thinking, is there a banjo bolt I can get that's slightly longer, this way it will save me having to take the charger out and retapping it as I'm not all that confident in doing that to be honest.
Title: Re: GT to G40 swap, no spark or fuel
Post by: hayesey on May 12, 2011, 02:19:03 PM
if there's only 2mm of thread it's not going to hold.  an engineering shop should be able to helicoil it for you.  If the oil supply fails when you are driving the car it's bye-bye supercharger time!
Title: Re: GT to G40 swap, no spark or fuel
Post by: jooshy63 on May 17, 2011, 04:33:06 PM
Right, so here's how it stands at the moment, the chargers being sent off to be helicoiled tomorrow by a local engineering firm.
I decided yesterday to get the car off my nans drive and keep it outside my own for the time being, only a couple of hundred yards down the road. Apart from the slight oil leak from the banjo bolt, I assumed the car would be all ok. Upon starting, the car began misfiring again and after letting off hard throttle, would cut out. The amount of black smoke leaving the car is ridiculous and I originally thought this would clear up. I continued to drive the car down the road for it to then begin kangooring or stuttering and under hard throttle, would have no boost whatsoever. I was then flashed by my mate behind me, pulled over and found that around the area where I gave it hard throttle, a huge puddle of oil had been dumped. Upon inspection, I could not seem to find where it had come from whatsoever purely down to the fact the whole underneath of the engine was covered.
Any ideas guys, I'm at my wits end with this now and considering taking it to a garage to get sorted.  ???
Title: Re: GT to G40 swap, no spark or fuel
Post by: ereeiz on May 17, 2011, 07:02:42 PM
Might be worth doing a compression test?

A few things to check :p

You said it sounded like a tractor, do you mean the exhaust is leaking or just the way it's running?

Are there any knocking noises from anywhere or tapping?

Any oil leaking out of anywhere? Can you smell it as you drive? Perhaps some is being squirted/dripped on the exhaust somewhere?

Most importantly, was the engine running alright before it was removed from the other car?
Title: Re: GT to G40 swap, no spark or fuel
Post by: jooshy63 on May 17, 2011, 08:33:37 PM
Quote from: ereeiz on May 17, 2011, 07:02:42 PM
Might be worth doing a compression test?

A few things to check :p

1.) You said it sounded like a tractor, do you mean the exhaust is leaking or just the way it's running?

2.) Are there any knocking noises from anywhere or tapping?

3.) Any oil leaking out of anywhere? Can you smell it as you drive? Perhaps some is being squirted/dripped on the exhaust somewhere?

4.) Most importantly, was the engine running alright before it was removed from the other car?

1.) I believe this was because the timing was out, which has now been sorted.

2.) There doesn't seem to be any noises coming from the engine, no tapping etc. It just seems to be misfiiring and kicking out black smoke pretty bad. I've had the spark plugs out twice now to clean them up from the black soot and still doesn't seem to run any better.

3.) As I stated, a huge puddle of oil spluttered out underneath last night but on a quick inspection today, I cannot seem to find where it's coming from.

4.) The engine was running absolutely fine with no problems whatsoever before it came out. The only thing that hasn't been swapped over from the original G40 now is the fuel pump, but I thought they would of be the same to be honest?
Title: Re: GT to G40 swap, no spark or fuel
Post by: jooshy63 on June 05, 2011, 06:14:54 PM
So it's been a few weeks since I posted the last thread now and the G40 is still not sorted or running properly. Since then the chargers been rethreaded and all oil leaks have been sorted.
I'm thinking it may have gone into some sort of back up mode as when disconnecting any sensors, the engine still seems to run as normal, almost misfiring and blowing black smoke pretty bad.
I've changed the plugs and let it run but no difference what so ever, all the plugs fire accordingly but when taking them out on inspection again, they all seem to keep getting covered in soot. I done a compression test while the plugs were out and all seems good.
The coolant light inside seems to be constant on even though it's to the max in the tank.
I drove the car last night 50 yards or so until boost came through, when it did come through, the car seemed to panic and began kangooring then when letting off the throttle seems to cut out.

I've tried explaining as much as I can although it may seem a bit jumbled but I need some help here people, I'm at the end of my tether as to what it can be.
Title: Re: GT to G40 swap, problems continuing...
Post by: extreme6 on June 05, 2011, 07:09:03 PM
had the same problem as you.as the boost would come in the car would kangaroo splutter changed coil problem solved
Title: Re: GT to G40 swap, problems continuing...
Post by: jooshy63 on June 05, 2011, 08:00:46 PM
Could you be a bit more specific mate, did you experience all the problems I'm having?
Title: Re: GT to G40 swap, problems continuing...
Post by: PeteG40 on June 05, 2011, 09:04:26 PM
coolant light - could be connection on the bottle.

As for running, does the chip match the injectors? as it sounds like its overfueling.
Title: Re: GT to G40 swap, problems continuing...
Post by: jooshy63 on June 06, 2011, 12:22:57 AM
What do you mean when you mention the chip matching the injectors.
The car ran absolutely fine before it came out the other shell.
Title: Re: GT to G40 swap, problems continuing...
Post by: ereeiz on June 15, 2011, 09:46:29 AM
You got good earths? sometimes if they're crap when you acclerate it pulls them about = crap connection = bad circuit = poor spark and misfire, etc.
Title: Re: GT to G40 swap, problems continuing...
Post by: Alvaro on June 17, 2011, 12:28:47 AM
are the leads in the correct order?
Title: Re: GT to G40 swap, problems continuing...
Post by: hardchargin40 on June 20, 2011, 02:04:25 PM
... and check the Lambda Sensor aswell.  Is it temp related btw?  Blue CTS?