OK, so's I bin usin me 200TDi daily fer the last few weeks, and the performance is causing me a bit of concern. The fuel regulator is wound in quite a bit for emissions reasons and doesn't smoke one iota, but above half throttle depressing the accelerator further makes little difference.

New props, axles etc, 1500 miles bedding in, but it still flatlines at 45 in 3rd, and on the flat will not go above 70. Get a downhill run to 75ish ( ) and it will hold it on the flat at about 2/3 throttle, but giving anymore juice does nothing. So, a couple of qweschuns

1. Is this normal performance for a 200TDi 90 with 170k on the clock after a rebuild? Got a recon LT230 with a BL logo in the casting (!!!!) and a sticker saying 1.4310:1 ratio)

2. If not, is it just a question of playing with the fuel regulator/throttle stop dooberry wotsit until you get decent performance/soot output ratio?

3. Am I barkin up the wrong tree and it's summat else completely (only other diesel motor I've had is a Megane with all fancy lectrickery)?

Orf t' bed, will catch up in't mornin.

Sounds like there's plenty of scope for adjusting the fueling and boost on that mate... get yerself a boost gauge off e-bay, mine cost a tenner for a tims one, should be plenty accurate for what you need.

Here's what I did with mine - best to do anything like this incrementally, testing as you go:

Turned full load fueling up approx 1/8th of a turn of the diaphragm spindle on the top of the IP and the max load fueling up by about 10 clicks of the 'starwheel' under the diaphragm. Wound the wastgate actuator arm in by about 6mm - was 0.75bar (stock figure more or less) now 0.95bar.

It'll pull like a train now without smoking, except a very small puff of soot on startup. Plenty quick enough and powerful enough for my purposes.

I adjusted the fueling first as I could do that without needing a boost gauge, then the extra boost afterwards. Opinions vary on which is the 'best' way to do it - if you can wait to get the boost gauge you can take your pick, if not, carefully adjust the fueling first.

Hope that helps,

try here STEVES SITE

Right then, intercooler is flushed out (with petrol) and new jubilee clips fitted, rest of induction side is fine. Just a quick quey though, would some injector cleaner type additive make a difference before I start tinkering? So a couple more questions...

1. Is it worthwhile running a tank of fuel through with some additive in it to clean the injectors/valve seats etc..

2. If so, which is the best treatment? Redex? or summat other, or maybe an additive and summat squirted down the inlet tact as well? Any pointers would be helpful as I want to make sure things are OK before I start tweaking or adding bits from twisted performance...

Take5 said:

Right then, intercooler is flushed out (with petrol) and new jubilee clips fitted, rest of induction side is fine. Just a quick quey though, would some injector cleaner type additive make a difference before I start tinkering? So a couple more questions...

1. Is it worthwhile running a tank of fuel through with some additive in it to clean the injectors/valve seats etc..

2. If so, which is the best treatment? Redex? or summat other, or maybe an additive and summat squirted down the inlet tact as well? Any pointers would be helpful as I want to make sure things are OK before I start tweaking or adding bits from twisted performance...

Click to expand...

I always use millers can't recommend it enough

Take5 said:

Right then, intercooler is flushed out (with petrol) and new jubilee clips fitted, rest of induction side is fine. Just a quick quey though, would some injector cleaner type additive make a difference before I start tinkering? So a couple more questions...

1. Is it worthwhile running a tank of fuel through with some additive in it to clean the injectors/valve seats etc..

2. If so, which is the best treatment? Redex? or summat other, or maybe an additive and summat squirted down the inlet tact as well? Any pointers would be helpful as I want to make sure things are OK before I start tweaking or adding bits from twisted performance...

Click to expand...

Its a good idea to use a fuel treatment in every tank of fuel bud, they've taken most of the sulphur out of fuel now which was the lubricant your injector pump was relying on and not built to last without. Like discoverytdi says the millers one is good and can be used in every tank full, it's also easy to measure out because of the handy little bottle it comes in, Morris Lubricants do a really good one as well in a similar vain, you want something with added lubricity in it to make up for the sulphur but some fuel treatments are designed as a one shot clean up and usually solvent based so dont go for them.

Riggaz

We use forte products where i work and they seem to do a good job too on everything from engine flushes,diesel and petrol treatments, cooling system protectors etc....etc worth checking out and see wot you think

Is your lift pump working OK?

Our 300tdi had a similar problem, the lift pump was gubbed and the IP was stuggling to get enough fuel over about 2500rpm...

landy10 said:

We use forte products where i work and they seem to do a good job too on everything from engine flushes,diesel and petrol treatments, cooling system protectors etc....etc worth checking out and see wot you think

Click to expand...

We use Forte as well bud but you cant use the diesel treatment in every tank as it's more of a one shot with every service.You are absolutely right Forte without a doubt make the best flushes and fuel treatments also air intake cleaner is the tits, i've tried em all, wurth, acp, add it, tetrosol, texaco and nothing works better but the Millers and Morris diesel treatment both can be used every time you fill up, not only adding lubricity to the fuel and cleaning but they also raise the cetane level of the diesel so the fuel detonates better.

Riggaz

you defo know your treatment riggaz