Testing Injector

Hi,

I've read many posts that sound simliar to the problem my '85 1800 Gti has just developed, but not exactly the same, (see 'Stuttering'). Many members seem to recommend checking the injectors are working ok. So just wondered what best procedure for this is?

Problem: car starts fine, but engine 'judders' when accellerating, struggles to pull off quickly, nearly stalls and generally sounds like a lawnmower!

The only thing I've done is replace the rear exhaust box with a new one,  (and tightened the clutch cable a bit). The hole in old exhaust noise may have masked hearing this problem, but could it have made it perform so poorley too?

Any help/ideas would be much appreciated!

Many thanks for looking

Prowler did an excellent how to guide for testing injectors

doing a search for Injector test by prowler should turn it up

if you can't find it I can have a go (but terrible at searching for stuff.. if I don't find it straight away I don't look any further)

It's on prowlers website. Direct link to it  http://www.vwgolfmk1.co.uk/Main/Testinjectors.pdf

It's a PDF document so you'll need adobe acrobat reader to open it with, it's an excellent detailed guide with lots of pictures to help!

Mike.

Thanks for the replies and the link to the injector test.

It looks more complicated than I thought, but nothing that I shouldn't be able to do with a little time - and good weather! However, I'll have to wait till Monday to give it a go as I'm working over the weekend, I'll let you know how it goes!

In the meantime is there anything else that might be causing the problem that I should check before taking the injectors apart?

Cheers

Stuttering is the most annoying thing to solve. Normally down to 1 of 2 main areas of the car: the Fueling system or the ignition system.

I would do a few obvious things first, like changing the fuel and air filters, and looking at the ignition sytem, changing things like plugs, leads, dizzy cap and rotor arm. All relatively cheap and easy to do.

Also worth getting the timing checked, and the co adjustment as well. Mine had a nasty stuttering problem, was simply down to the co adjustment on the airbox making it run too rich.

Mike.

I just to it out for a spin, it's definitely a new problem, as it wasn't this bad 2 days ago.

Engine revs fine when not in gear, but drive it and it just doesn't like it!! I put my foot down and nothing really happens, the car splutters then goes, then jerks back, all the time sounding a bit like an old VW Beetle!

I'll check a few of the things you mention first. Perhaps as it's suddenly gone it is more to do with fuel/air mix, and not the injectors.

The spark leads & Distributor etc are all very new, I took the caps off and sprayed some WD40, and the spark plugs look in good shape, (but haven't removed them to ckeck inside appearance yet)

If it were the fuel pump or filter would I still be able to rev the engine fine without it spluttering?

I can't believe I just changed the exhaust and now a new problem appears - these cars love attention!!

Anything else I should check?

Cheers

definitely sounds like it could be something linked to the air/fuel mixture. The characteristics of an engine change when it's under load to when it's not, hence the reason it can rev fine when still, but have problems under load. It's one of those situations where you just gotta change bits and see what happens I'm afraid!

Mike.

I'm sure you're right, I'll have to have a tinker in the light of day, and I'll post how I get on…

Many thanks for your advice!

Cheers