1.8SPi won't rev and won't change up Auto UPDATE

[Bellend]

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.

[Bellend]

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. 

[Bellend]

VAG-COM showed a Hall sensor code, disconnected battery, had dinner, cleared codes and rescanned and no codes plus it's revving up now. 

Oh well, get insured, shove in some ATF and go for a drive! 

[LowlifeDubber]

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.

[Bellend]

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. 

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.

[Bellend]

[Bellend]

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. 

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.

[Bellend]

Not that anyone gives a bollocks but:



Putting it down to the throttle body/SPI unit.

Checked air leaks, nothing.

Grab a second hand one.

[LowlifeDubber]

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.

[Bellend]

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. 

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. 

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.