GolfGTIforum.co.uk
Model specific boards => Golf mk2 => Topic started by: Procomp on 30 May 2009, 19:48
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Hi
Looking for some advise on where to go next on my 16V and it's engine problem.
Basically, the car will start and run on tick over absolutely fine. If you start off ......... again it will drive ok. But if you either try and floor the gas pedal either stationary or on the move, the engine begins to stutter and struggle :sad:
When I floored the gas with the car stopped, the revs get to around 2,500prm, then they can't seem to get any higher than 3,000rpm, the needle just labours between 2,500-3,000rpm and the engine sound as if it's not getting enough fuel/air mixture into it.
The only way to drive the car, is to be very gentle on the gas pedal, as even when you are driving along, it can begin to become very jerky as the engine struggles again.
Not sure if this is the cause or just another issue to resolve, but the fuel pump is very noisy. You can hear it when you start the ignition or even when the engine is running. Does anyone know if the pump works faster as you apply more gas?
The fuel is getting through to the metering unit ok and the fuel is fine. Any advise or areas to look at would be welcome.
Cheers :smiley:
G
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Hi when was the last time you changed the air and fuel filters?
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This sounds like ignition to me. How old are your sparkplugs, dizzy cap etc? The mixture could be putting the spark out and this would be more evident when you load up the engine.
Check your plugs and look at the electrodes. If they are thin or the gap is very small, then replace them.
Check your distributor cap and rotor arm. The contacts should still be visable and have a frosted appearance. Any burning or breakage requires them to be replaced. Also check the carbon brush in the cap. It should be springy and be able to be pushed in and spring out easily.
Start with these, then post up an update. :wink:
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also when did you last change the plugs,leads,dizzy and rota arm as i had a smiler problem on my suzuki sj and it turned out that the plugs did not give a good enough spark to burn the fuel when revved but did not misfire
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just been beaten to that one
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Hi
Thanks for the suggestions. I'll have a look at the dizzy/rota tomorrow morning. Also will look at the filters out of interest.
If anyone has any other suggestions, please keep em coming!
Cheers!!
G :grin:
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Update on the car...........Changed the dizzy and rota this morning. The leads and plugs were done by the previous owner a few weeks ago, these look ok to me, so I've left them as is.
Unfortunately still the same problem. Even added some injector cleaner to the jets, but the car still struggles badly if you floor the accelorator. It won't go over 3,000rpms.
Thinking it worth looking at the fuel filter and pump (this is very noisey). I've alreadly replaced the fuel metering unit as when I got the car it was a non-runner because the old unit was shot. The car doesn't have an air filter at the moment in the air box, so I wondering if this could be a problem as well, although the car tickover and starts ok as I've said before? Will get one of course, but couldn't find one at Halfords this morning.
If anyone got any ideas where to go next, it would be great to hear them.
Thanks again !
G
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You didn't say if you looked at the plugs. These would have been the first things I would have looked at. And even if the gaps looked ok, the plugs and tell an awful lot about what is going on with the engine.
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I didn't have a socket that would get the plugs out, but I will have tomorrow. I've got some new plugs ready to gap and go in which I'll do tomorrow night and let you know how the old ones are looking.
Appreciate the help btw!
G :smiley:
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Check for split hoses or stray vacuum pipes. Very tempramental engines, as I've recently learnt!
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What does the vacuum unit on the air box do? I've just noticed that the two wires have been connected via spade connectors. The original connector looks to have been lost or not replaced and the connections don't look all that good.....one of the wires is hanging off infact!!
Could this be contributing at all?
I'll also check the hoses. I think these are OK, as I've reconnected the fuel metering unit yesterday using the right circlips, etc. Won't hurt to double check though.
Cheers
G
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Sounds like bosch k injection fault to me.. lots of little faults you can get on this system..
the fuel pump needs to be tip top and with out a set of gauges to test you will struggle..
the system is totally pressure relliant , try a filter on it and also the feed in to the warm up regulator on the end of the head , some of them had a small gauze filter in there .. check that is clear.. also in the metering head itself there is a 17mill nut on the side.. this is the system pressure regulator. take it out and you will find a spring with a plunger on the end with a seal on it. check the seal and make sure it is ok, the seal can fail allowing fuel pressure to go back to the tank and stopping the injectors opening properly..
see how you get on .. there is a few more things on this system, let me know ...
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Thanks Scotty.....will look at those things and let you know how I get on.
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disconnect the plug from the main pump, turn key 1 click. if the in-tank pump doesnt prome this is the cause, the main pump is being starved of fuel. this will make it noisy and struggle to supply enough for high rpm. also fact its noisy could just point to the fact its buggered!
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Had this problem with my 16v and as you've stated (although not in first post for some reason) that your fuel pump is noisy rubjonny is spot on as always ... most likely suspect is in tank pump, not v expensive from gsf and the like and 10min job to replace :)
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I'm in the process of fitting a new fuel pump, as I couldn't stand the noise any longer, even if it's not the cause of the engine issue, it needed to be done. I've also done what you advised, I can hear the in tank pump prime ok when the I've disconnected the external, so I'm thinking this can be ticked off. On a bonus point, I've just found out that the fuel filter is brand new, so at least I don't need one of those!!
Once I get the darn screw's out and managed not to spill fuel all over the place, I should be able to see if I've cured my problem, or if it back in the engine bay :sad:
I will keep everyone updated, as I really appreciate all the help I'm getting and I'm sure the response on here, will also help someone in the future with the same/simliar issues :tongue:
cheers
G
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I'd advise new screws and seal from vag at the very least, you'llo want to check the housing over very carefully too. on my digi the fuel leak i thought was from the seal turned out to be a crack in the housing due to a rusted out screw! then when i did my 16v swap within a week the known good 16v pump i fitted started leaking from the join on the housing, so i got to do the job a second time :grin:
GSF do the 16v housing, its a gen vag part too :) Oh and if you do put a new housing on there I'd recommend you get 4 new rubber mounts, as they almost always split in haf when you try to undo em.
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When you say a new housing and seal do you mean what the screws go into around the body of the pumps?
My new pump has both a rubber seal and a new black plastic housing around the body of it. so just want to clarify?
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by the housing i mean the big black reservoir the pump is fitted to, the screws i mean the 3 that hold the pump into the housing :)
You might get away with just a pump swap though, just as i say on my digi one of those screws had corroded and split the casing :(
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Cheers for the clarity. I'm going to try and do the pump swop out tomorrow, so if I can get away without buying the additional parts, but looking at the state of the screws.....I may need to :smiley:
I'll keep the updates coming lol!
G
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Afternoon all :smiley:
Just thought you'd like to know that with all of your help, I've finally got my 16V running !!!! :laugh: I swopped out the fuel pump late last night and tried her early this morning.......god she's a goer :drool: !!
I purchased her as a non runner and as my first GTI, I was unsure what to expect, but I'm really happy with the performance of the 16V and think with a bit of tidying up, she'll be a great car for me.
I also just wanted to say a big Thank You to everyone for the post's, the help, the encouragement and the general good nature and willingness to provide good advise from everyone who's helped me. This is a really good forum and I look forward not to the next problem I have, but knowing there's a bunch of guys I can ask the stupid questions to and once the laughters over, get the right advise first time! So cheers to you all :smiley:
I hope the level of information on this issue will help someone else like me in the future, who when stuck, needs a bit of expert help :smiley: