Like a rev limiter, with added blue smoke!

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flatlander

flatlander

It's not broken!
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So, finally running my rebuilt 200, dead chuffed that it started as soon as I'd bled the fuel lines. Done about 100 miles now, and a problem I thought might be due to air in the fuel system is still here, worse if anything.

Engine starts and revs OK, but at a certain revs, about equal to 55mp in 5th, with a 1.2 transfer box, it suddenly stops revving, just like a rev limiter, but with blue smoke from the exhaust. When I slow down it pulls again OK, but quits at higher revs every time.

Has a professionally rebuilt injection pump, refettled injectors, skim, rebore, new lift pump.

I wondered if it could be the turbo dump valve opening too much / too soon? Any more sensible suggestions?

Cheers lads.
 
I had a similar problem too this it turned out too be by air induction pipe compressing under pressure, make sure your air filter and air/breather pipes are all okay, try a short run without air box assembly attached, instantly sorted me out, used too feel like you hit a wall till u backed off
 
Thanks for the suggestion Conn, but the inlet is new silicone tube, with a large air filter. Feels like hitting that wall though. A pic should be attached.

Tim, it could be the timing, although I set it by the book, with the proper pin and all. I will check it tomorrow.
 

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Someone on another thread had a similar problem, turned out it was the fuel return banjo was different and did not have a bigger enough restrictor
 
I know you've had the engine rebuilt but what about the turbo, if the turbo has done loads of miles and your pulling hard then this could be lacking the power pulling the engine back, and if the turbo has sat around while you did the rebuild then the seals inside may have gone hard, causing the blue smoke.
Have you checked the oil level since the rebuild if it is low or lower than before than this could mean a leak, and if the piston rings and valve stem seals are new then the only likely cause could be the turbo.

Black smoke = excessive fuel

Blue smoke = burning oil
 
As in post 5, the problem was all down to the missing restricter in the fuel banjo. I had stripped the turbo, turning the outlet through 45 degrees to fit better. The turbo kicks out over 1.5 bar - I stopped accelerating at that point!
 
flatlander said:
So, finally running my rebuilt 200, dead chuffed that it started as soon as I'd bled the fuel lines. Done about 100 miles now, and a problem I thought might be due to air in the fuel system is still here, worse if anything.

Engine starts and revs OK, but at a certain revs, about equal to 55mp in 5th, with a 1.2 transfer box, it suddenly stops revving, just like a rev limiter, but with blue smoke from the exhaust. When I slow down it pulls again OK, but quits at higher revs every time.

Has a professionally rebuilt injection pump, refettled injectors, skim, rebore, new lift pump.

I wondered if it could be the turbo dump valve opening too much / too soon? Any more sensible suggestions?

Cheers lads.
Click to expand...
i would think its likely to be a fuel restriction ,blockage /air leak etc or pump needs looking at , blue smoke is oil ,and could be poor ring/bore surface/fit ,new bored surface needs at least 1 thou preferably 2 thou honing,new bores shouldnt be idled or free revved but hard worked
 
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