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Model specific boards => Golf mk2 => Topic started by: oakgreengolf on 19 January 2009, 18:50
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Since it has gone in my mk2 its now spluttering under acceleration. It starts and Idles fine and runs ok, just when you give it a few revs. Its like there's not enough fuel getting through?
Ive checked plugs and leads. lambda sensor is plugged in. fuel filter is fairly new. Any ideas :sad:
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Does it do the same if you unplug the lambda?
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as dh said unplug lambda, if still plays up check pipework to map sensor and wires to tps
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Ill have a look tonight. Am i going to cause any problems driving it as i need it for work :undecided:
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Shouldn't do, provided you don't thrash it, although it might run rather rich (better than lean anyway).
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Finally got round to taking the car to the garage. He admitted he hadn't spent much time on it as he was busy :sad:. Anyway went for a spin round the block with him and managed to get through the spluttering and it will rev freely over 4k. He suggested it was more of a flat spot? He also suggested the fuel pump maybe the problem. the kr runs at 5bar of pressure where as the abf is 3ish. I have unplugged the lambda today and there is no change, ive also checked for leaks, changed the relays, dizzy and arm.
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Fuel pressure *should* be regulated by the regulator on the end of the fuel rail, so the pump *shouldn't* make that much difference, as it should be over-specified, if anything. Possibly replace the fuel filter and maybe test the pump for flow and pressure, if you can get access to those facilities.
Did your last engine grenade itself, or was it just worn out?
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try a couple of drops of machine oil down the vac hose connection on the fuel pressure regulator. A couple guys on clubgti reported this fixed a problem on their cars, apparently the fpr can get a bit sticky? Not had this issue mesen but since its free well worth a try!
Just to add when I fitted an abf to james' mk2 we used a kr 16v fuel pump, and it ran no problem at all.
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DH my old engine dropped a valve so not sure whether its related. Ive got no way of testing the fuel pressure as for the fuel filter its fairly new so this shouldn't be the problem. Its definatly over fueling as the plugs are very black so im thinking lambda, MAF, or a sensor of some sort?. The garage checked the emmisions and the HC where very high which he said is unburn't fuel. Ive got the lambda at the bottom of my 4 branch after the flexi joint could this be causing a false reading, although as i unplugged it i thought i'd have seen an improvement. Ill give that machine oil a blast too.
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It won't be the MAF, as there isn't one.
Might be the MAP (Manifold Absolute Pressure) though - is the vacuum hose connected to the ECU?
Is it getting temp signals to the ECU loud and clear?
Got a photo of that lambda install?
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Yep vacume hose is connected. Whats this MAP?
heres that pic of the lambda
(http://i179.photobucket.com/albums/w313/richjc4/P1010635.jpg)
4 branch is then straight after the flexi joint
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Got a photo of that lambda install?
It sounds like your asking for niche porn...
I imagine you to be rubbing your thighs "Vic Reves stylee" whilst asking that.
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lol :grin: i see what you mean really im not! :embarassed:
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lol :grin: i see what you mean really im not! :embarassed:
Eh? You didn't say it. Wasn't it DH?
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oh good
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MAP has braded hose on the original install its 110cm long goes from TB or comes off the vaccume pipe for the brake servo ( before the 1 way valve )
HC really shoudl be very low
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^ if that description doesnt hep, the map senor is in the ECU. theres a nipple in the side of it that needs hooking up to vacuum ;)
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Took it to someone to have a look at today, hes rather baffled too and couldn't believe how bad the flat spot was. went on the motorway to get there big mistake couldn't get above 55mph so had to come off at the first junction. Danny p you know that green and red wire we spoke about is this deffinatly in the right place. (ECU pin 7 which is the ignition switch start signal).
Also I had to cut this wire bellow to remove loom from the toledo not sure whether its related?
F
1 - Red/blk- starter motor pin 50
\- red - starter/inhibator & reverse switch pin 1 (A/T)
4 - brn - earth (location 85)
5 - red/grn- Digifant ECU pin 1
6 - blk/red- reverse light switch (M/T) or starter/inhibator & reverse switch pin 6 (A/T) (fuse #14)
7 - blk/blu- reverse light switch (M/T) or starter/inhibator & reverse switch pin 2 (A/T)
9 - grn - TCI Unit (US 9a 2.0 16V MK2
MAP is all connected even changed the fuel pump today and re-checked the timing no change :sad:
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is the rev counter bounceing around ?
fuel lines defantly the right way round ?
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Could the fuel 'return to tank' pipe be kinked or blocked, preventing the fuel from returning and thus over fuelling the engine? I don't know much about Kjet yet, so it's just a thought. If the engine has been swapped, then maybe a pipe got damaged in the process. :undecided:
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yes it is on start up, I connected them the same as they came off at least i think i did, blue is going into the fuel pressure reg and the black into the injectors
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F/5 is a starter motor feed, its not going to effect anything when driving along. the pipe to the fpr is the fuel return, i can never remember which way round the 2 pipes are, but a quick n easy check is to look at what colour pipe is attached to the fuel filter, this is the feed.
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fuel filter pipe is black so this seems ok
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this chould turn into chaseing an unknow fault so i think its time to invest in an OBD cabel and ask the engine what it thinks is wrong
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Your not going to beleive it was meddling round the fuse box and had the toledo one next to me. Noticed relay 30 wasn't in the golf, plugged it in job done. :embarassed:
Goes like stink yehhhhhhhhhhhhhhhhhhhhaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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Your not going to beleive it was meddling round the fuse box and had the toledo one next to me. Noticed relay 30 wasn't in the golf, plugged it in job done. :embarassed:
Goes like stink yehhhhhhhhhhhhhhhhhhhhaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Haha! nice one! glad you got it sorted!
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Ahhh, look, there's the happy sound of a man enjoying an ABF running on digi 3.2, as it should be.
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:smiley: just got to find some alloys now