Technical help pops and bangs 4000 rpm

[fiatuno320bhp]

HELP just got a uno turbo haveing a lot ov pops about 4000 rpm and power gose **** think its some thing to do with the pipe on the ecu when i took it off is fine but dont now if its in rite place it went to the inlet manifold is this rite if it is any idea y shes poping thanks

 

[alexGS]

Welcome to the forum :wave:

Pops and bangs must be the 320 horses trying to get out

The pipe to the ECU is for vacuum/boost sensing, to adjust the ignition timing. It's pretty important - if not connected, the ignition timing could be quite wrong (retarded). The small pipe should run to a T-junction with the pipe going to the dump valve/blow-off valve (as applicable). And yes, they both connect to the inlet manifold (or more correctly, plenum chamber).

If the calamities happen at 4000RPM, is there also a good deal of boost at that stage? Does the amount of boost make any difference? I would expect that more boost = more problems?

If so, it sounds like it is too lean, so perhaps the airflow meter is faulty (not registering the full airflow) or perhaps you have an inwards air leak between the airflow meter and the turbocharger. Check the large pipe carefully for splits and make sure the clamps are tightened in the right places.

Have you checked/replaced spark plugs and leads?

Some details of the modifications to get 320bhp would be good, too

Cheers,
-Alex

 

[fiatuno320bhp]

hear is some pics taken the plugs out today and thay are black think it means its rich ?any ider do any one now what the blue pipe went to ? in pic6

 

[Gargamill]

mate i will get you some pics of mine tomorrow and you can see where your pipes go

 

[fiatuno320bhp]

can some one tell me if this is a standard fule valve thing lol

 

[DRUE1]

my turbo pops and bangs when i take my foot off the acc
and the fse on your motor is not standard :slayer:

 

[oldskoolmk1unoturbo]

you must connect a vacumm pipe onto the ECU