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sick 200tdi

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extreme90:
my 90 has devaloped a cold recently  :'(
low end power is fine, but top end, half throttle and above the engine dies off, hesitates, miss fires, u name it, it does it
its not as bad for cold but when the stat opens its horrific
when it comes upto 1 bar it starts playing up, it will occasionally reach max pressure at 1.5bar, but thats with it coughing as spluttering
if i rev it out in neutral and hold it there ( wel if its gonna go bang it mite aswel do it in a good way  :dance:) it'll missfire and backfire ( rather awesome considering its a derv  :lol:)
so the only things ive got to go off are :-0
- horrific missfire on initial start up
- lack of top end, hesitation ect ect
- worse soon as reaches op temp

so far ive done the following then gave up on it tonight
- new lift pump
- new air/fuel filters
- blown fuel lines, both pick up and return back
- checked diaphram for splits
- check pressure side of air system
- intake side of system
- ran of aux tank
- ran with out fuel stop fitted
- carbon monoxide tested coolant..ok
- checked for excess breathing...its like new
and something else thats slipped my mind for time being  :lol:

seems to me asif its fuel starvation
cant be the wastegate cutting in, its never done it in the past year  :roll: of running 1.5bar
isnt head gasket

its got me puzzled
and one else think of something ?
cheers
dan

pondy653:
Dan,
Long shot I know but mine did similarish a while a go.  Is the Spade terminal good and tight on the Shut off Solonoid, under hi rev condition the terminal if loose fit (as mine was) gives intermitant contact simulating miss fire (as tempreture increases so does resistance) so as I say a long shot.

Good luck

Tony

extreme90:
ran it without the fuel stop fitted as when in the state of tune as mine, they have a tendency to kill themselves
as mike foud out  :dance: :dance: :lol:

Xtremeteam:

--- Quote from: extreme90 on March 25, 2008, 22:01:40 ---ran it without the fuel stop fitted as when in the state of tune as mine, they have a tendency to kill themselves
as mike foud out  :dance: :dance: :lol:

--- End quote ---

coulda told u it woulda been the stop solenoid,
turn the pump down before it <edit> it totally,
as i found out on the way to work one morning

also clean the return out on the pump as it has a small filter in it

extreme90:

--- Quote from: Xtremeteam on March 26, 2008, 12:20:17 ---
--- Quote from: extreme90 on March 25, 2008, 22:01:40 ---ran it without the fuel stop fitted as when in the state of tune as mine, they have a tendency to kill themselves
as mike foud out  :dance: :dance: :lol:

--- End quote ---

coulda told u it woulda been the stop solenoid,
turn the pump down before it <edit> it totally,
as i found out on the way to work one morning

also clean the return out on the pump as it has a small filter in it

--- End quote ---

the stop solenoid was fine mike
cleaned the filter also
ran of a seperate fuel supply aswel
gonna double check the air system tonight to make sure there isnt a hose blowing itself inside out under  high boost pressure
really miffing me this is  :-k

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