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Model specific boards => Golf mk3 => Topic started by: Bellend on 31 December 2010, 17:37

Title: 1.8SPi won't rev and won't change up Auto UPDATE
Post by: Bellend on 31 December 2010, 17:37
Just a quick one for hints & ideas, went in the Golf quickly today and it's suddenly gone awful.

Starting it starts, splutters and stalls, bit of revs and it then will fire up.

However, we were on a VERY slight incline and it topped completely out at 40MPH and would not rev anymore. It then got stuck in 3rd gear.

Now I cannot decide whether the gearbox is slowing the car down or there is another issue with the car which is causing it not to rev enough to change. I pulled it into 2 on the selector then stuck it back into D and it sat there changing all over the place and wouldn't move then eventually picked up.

After any inclines it will go into 4th and will go quick enough but it's driving EXTREMELY slowly. Revs are slow and it has NO power. I'm sure it's slightly missfiring.

I have no time to look until tomorrow, wondering if anyone's got any ideas so I can get straight on with it, there was oil round the airbox which has come out of the throttle body. Not loads but a bit.

Gonna top the box up, change the air filter as it needs doing and try changing the fuel filter. Plugs and leads are pretty new but I'll clean the plugs up.

Wondering if it needs a temp sensor in it as it starts fine when warm.

Cheers.
Title: Re: 1.8SPi won't rev and won't change up Auto
Post by: Bellend on 31 December 2010, 17:44
Ahh, get's to 4.2K and refuses to rev anymore.

I'm thinking hall sensor if it has one?

Distributor timing looks very slightly to the right but it's always been like it ever since we got the car and if you set it so it's spot on it doesn't rev properly.  :undecided:
Title: Re: 1.8SPi won't rev and won't change up Auto
Post by: Bellend on 31 December 2010, 19:30
VAG-COM showed a Hall sensor code, disconnected battery, had dinner, cleared codes and rescanned and no codes plus it's revving up now.  :huh:

Oh well, get insured, shove in some ATF and go for a drive!  :cool:
Title: Re: 1.8SPi won't rev and won't change up Auto
Post by: LowlifeDubber on 31 December 2010, 21:06
Similar thing was happening to Potter(same 1.8 monomotronic engine) turned out it was the daft rubber gasket that goes between the throttlebody and inlet manifold,they are a common problem with these engines too.
Re: the dizzy mine is the same if you set it cock on the mark from factory then it revs high and doesnt come down properly,so i set it up with a timing light and vag com and it runs fine now.
Other things are temp sensor or iat sensor as they dont always show up on vag com.
Title: Re: 1.8SPi won't rev and won't change up Auto
Post by: Bellend on 01 January 2011, 12:50
Cheers mate. Rubber gasket has been changed and is fine.

Right now it's sat on the drive and it basically started, reved to 6K, cut out and now will not rev past 3K. or 3200K dead.

AND I've just noticed it's on 140K WOW.  :shocked:

Uploading videos. It sounds VERY deep and like it's running on three, except idle is fine, all four cylinders firing and if you remove any leads it makes a difference.

I'm going to get a second hand distributor & a new temp sensor.

Title: Re: 1.8SPi won't rev and won't change up Auto
Post by: Bellend on 01 January 2011, 13:08
(http://i162.photobucket.com/albums/t265/JoshoRey/th_VIDEO0023.jpg) (http://s162.photobucket.com/albums/t265/JoshoRey/?action=view&current=VIDEO0023.mp4)
(http://i162.photobucket.com/albums/t265/JoshoRey/th_VIDEO0024.jpg) (http://s162.photobucket.com/albums/t265/JoshoRey/?action=view&current=VIDEO0024.mp4)
Title: Re: 1.8SPi won't rev and won't change up Auto UPDATE
Post by: Bellend on 03 January 2011, 15:28
UPDATE. Car seemed all happy so I got a months insurance.

Jumped in the car full of excitement, pull off the very dangerous drive and the bastard stalled itself.  :cry:

The car sounds way too deep. Too much air in the mix I reckon but it tops out at 3K and it actually goes quicker with less throttle.

I'm positive it needs a throttle body or throttle sensor, it has one right?

I'll have to pick one up. Still think the hall sensor is slightly dodgy.
Title: Re: 1.8SPi won't rev and won't change up Auto UPDATE
Post by: Bellend on 03 January 2011, 21:20
Not that anyone gives a bollocks but:

(http://i162.photobucket.com/albums/t265/JoshoRey/th_VIDEO0026.jpg) (http://s162.photobucket.com/albums/t265/JoshoRey/?action=view&current=VIDEO0026.mp4)

Putting it down to the throttle body/SPI unit.

Checked air leaks, nothing.

Grab a second hand one.
Title: Re: 1.8SPi won't rev and won't change up Auto UPDATE
Post by: LowlifeDubber on 04 January 2011, 11:19
Yes mate i would definatley say thats a fuel/air problem.Have you checked the pipe that goes from your inlet manifold to the brake servo?These can let in loads of air.
If it was me i would go get another spi unit,they have a tps and an IAT built into them so you would be killing 2 birds and all that.
If you have a look for Grandmasterramrod i think he's called,he has the same engine and has got a spare spi unit sat in his bedroom,it was only just before xmas too.
Might be worth giving him a pm see if he has got it still.
I dont have one but i have got loads of other parts like a dizzy,head various pipes etc.
Gimme a shout if you need owt else. :cool:
Title: Re: 1.8SPi won't rev and won't change up Auto UPDATE
Post by: Bellend on 04 January 2011, 17:24
Cheers matey.

Done a bit on it, dad found a split in an air pipe, how he found it and I didn't, no idea.  :lipsrsealed: :rolleyes:

I blame the dark.

Anyway, fixed it and no change. Borrowed works potentiometer, took the big plug off the throttle body, found a live and an output, found the resistance, stuck the potentiometer on and left the plug disconnected. It now revs OK but no idle and low end is sh!te.

So cheers for that mate, customer nicely bought my work car key back after hitting a curb and by the time we'd rescued it, it was too late. So dads gonna grab one early in the morning and stick it on.  :cool:

I will deffo let you know as I might want that dizzy off you because I'm fairly sure there is an intermittent hall sensor fault with it.
Title: Re: 1.8SPi won't rev and won't change up Auto UPDATE
Post by: LowlifeDubber on 04 January 2011, 18:42
Well it's just sat on the shelf mate,so let me know,it was only taken off a couple of months ago when i id an engine change after the missus blew it up  :grin: so i know it works perfectly.

Will take some numbers off it in the morning for you to check.
Title: Re: 1.8SPi won't rev and won't change up Auto UPDATE
Post by: Bellend on 05 January 2011, 18:32
Will let you know, cheers mate.

Dad got a TB today, went to turn the car round, went onto the road and it died. Rolled it down the hill, stripped it there and then and then found it was the wrong throttle body.  :rolleyes:

My fault, should have checked. It's off a 92 so therefore has less pins then the one I need. I swapped the top of it over though containing the injector.

No help.

Eventually got it going and it took 20mins going round quiet roads to get 20seconds up the road. Used an amazing amount of fuel.

Disconnect O2 sensor, no change. Changed temp sensor, no changed. No visible airleaks unless it has a massive manifold leak, not detected by spraying carb cleaner all around it.

What else can it be? Changed the fuel pump relay as there was a spare (working) in the car, no help. There was fuel in the pipes up top when I took them off. It's also using stupid amounts of fuel, so I'm positive the pump is OK.

What else can it be? Unless it really is something like the distributor or leads, but they are all sparking.

Timing is fine.

Have to get it returned and get another elsewhere.
Title: Re: 1.8SPi won't rev and won't change up Auto UPDATE
Post by: LowlifeDubber on 05 January 2011, 19:20
Timing definatley isnt 180deg out?
Try doing a compression check(with throttle wide open) see what reading you get,these engines are prone for the headgasket going badly between pots 1 and 2 giving all sorts of weird problems.When it went on hers it made such a weird deep noise,i thought the airbox had fell off.
Im still swayed to the throttle body though mate.
Title: Re: 1.8SPi won't rev and won't change up Auto UPDATE
Post by: LowlifeDubber on 05 January 2011, 21:12
Got some numbers off that dizzy for you mate.
Z415
0257 520 036
050 905 205 AH

£10 with a new Dizzy cap :grin:
Title: Re: 1.8SPi won't rev and won't change up Auto UPDATE
Post by: Bellend on 05 January 2011, 21:45
Cheers for that mate.

Mentioned headgasket and apparently it overheated twice, once badly before trouble.  :rolleyes:

Nobody told me.

Proper weird one with the fuel suddenly going up, but the fuel pump is forcing a lot of pressure.

Engine is running PROPER deep, so deep you can take the air filter off and it makes no difference.

No airleaks, confirmed. Worried.

Just spent £200 insuring the poxy thing. BADLY need it next Friday onwards.

Gonna take home the headgasket testing tools, do a  compression test as you say and see what it brings up. If it is, I'll swap the insurance and tax over to my Golf and use that.
Title: Re: 1.8SPi won't rev and won't change up Auto UPDATE
Post by: LowlifeDubber on 05 January 2011, 22:21
I thought it was a Golf we were talking about? :laugh:What engine code is it just out of interest?Ive got a good straight head here too if yours turns out to be buggered.£25 to you :grin:
I will get my garage empty if it kills me ha ha
Title: Re: 1.8SPi won't rev and won't change up Auto UPDATE
Post by: Bellend on 05 January 2011, 22:35
I thought it was a Golf we were talking about? :laugh:What engine code is it just out of interest?Ive got a good straight head here too if yours turns out to be buggered.£25 to you :grin:
I will get my garage empty if it kills me ha ha

Haha nice one. May well come and raid it.

I've got a 1.6MPi, sitting still cause insurance is stupid.

My dad's got the 1.8SPI we're having trouble with. Needs a car so if the h/g has gone, chuck the insurance and tax on mine.


Cheers though, see what tomorrow brings.
Title: Re: 1.8SPi won't rev and won't change up Auto UPDATE
Post by: LowlifeDubber on 05 January 2011, 22:51
Cool,keep the thread updated,im interested to see what the problem is now :grin:
Title: Re: 1.8SPi won't rev and won't change up Auto UPDATE
Post by: Bellend on 05 January 2011, 23:01
Will do. Was reading another thread, same problem, never did post the final result. So annoying.  :grin: