help pls strange noise from exhaust

[simgy]

its a sort of cross between a whistle and a chirpy sort if noise.been doing it a bit, not there at startup normally takes about a minute at tickover or driving to appear. sounds ok when idle just does it when revs come on. anyone know what it could be engine is a di

[100ps_drw_hicube]

is the manifold bolts tight?? as this causes a whsitle when loose

[simgy]

thanx m8 ill check em but just to clarify the noise is comin out the smoky end
is it possible that incorrect pump timing can make a noise like this?

[MrMPuk]

I wouldn't have though so, why have you been playing with the pump?

[simgy]

just guessing it might have something to do with it but no i havent touched it. the engine runs ok just this noise is makin me not trust it

[crazyscoot]

turbos whistle and if you have a freeflow airfilter you can get a chirup type of noise when you come off the gas. also i had a strange noise once and found it to be the pipe connecting the air box to the turbo was half off

[simgy]

non turbo and noise stops when u take the revs off

[100ps_drw_hicube]

i had this on my old van (n/a) 1 of the ex manifold bolts was loose tightned it up and it stopped i cant see it being many other things

[simgy]

just checked all bolts tight no gaps, never easy is it

[madmark]

on thew original 1990 speck di they had allot of ford exhausts that used to sould like a kettle boiling going up the road ,it was great and for some reason if you had that noise the engine was spot on ! but its very unlikely you still have that type exhaust if your van is 1989-91 but if its just a wistle then i wouldnt worry to much!

[gemini]

could be the baffles breaking up in the rear exhaust box

[Smooth Hound]

Could it be some sort of vacuum leak.
Mike

[madmark]

what year is it you havent said???????

[simgy]

thanx for all the suggestions guys im keeping me fingers crossed its the exhaust. the engine is a `94 di ive fitted in my mk2. while im at it ive noticed at speed it seems to want to steer where it fancys especially when u hit a little bump.is this due to the heavier engine being fitted ? and if so can anyone recomend a cure pls?

[madmark]

mate this is a conversion that i have donea few times, i even chaned the springs and it still wanderd all over the place! mk1 and 2 are all overthe place normally anyway! i have the essex v6 in my mk1 now and that will go anywere if you hit a pot hole
maybe some later di springs might help but they just never drive the same when they have been converted!
i can recal years ago i had a mk2 lwb minibus i fiited a brandnew york diesel and i had an old scouts motor wicth was a factory york diesel and the factory one drove like a swiss watch! i just couldnt get the converted one the same no matter what i done!