C70 T5 Turbocharger boost tech advice

[mick1275]

I have a C70 T5 2.3 COUPE 2001 with a 16T HPT, all standard and over the last 6 months ive noticed as im climbing up the revs around 2500/3000 rpm steady away no lead foot I hear my turbo is acting strange im getting a louder whooshing noise as if it sucking in mass air ,The performance is getting poorer The situation is it doesn’t seem to be holding the boost pressure then releasing it and pulling away its slow at climbing up to high rpm .My escort turbo pins me more @145bhp. What could be failing that causes these kind of symtoms.There is No warning lights on, no smoke, no rattles. Could it be my intercooler pipes worn, waste gate actuator spring weak, any ideas guys as im going start to put on the gauges to find out what pressure i am running at

[mick1275]

So! ive just carried out some service work ive blown out the intercooler ive replaced all hoses with high pressure vacuum hoses,ive put on a new actuator as the old 1 I took off didn’t have much resistance at all when I pulled the rod out the new 1 has 3 times more strength all small bore vac pipes are ok .Just been out 4 a test run and its exactly same it does pull a little better but I wouldn’t buzz from it really Could this be the 1st sign of a wearing charger .I had an MOT yest and the emissions were 0.008 excellent results from CAT MAF and Lambda sensors so I can rule out fuel air probs ?????????????????? I just wish it would throw up the ECM light

[mick1275]

So! ive just carried out some service work ive blown out the intercooler ive replaced all hoses with high pressure vacuum hoses,ive put on a new actuator as the old 1 I took off didn’t have much resistance at all when I pulled the rod out the new 1 has 3 times more strength all small bore vac pipes are ok .Just been out 4 a test run and its exactly same it does pull a little better but I wouldn’t buzz from it really Could this be the 1st sign of a wearing charger .I had an MOT yest and the emissions were 0.008 excellent results from CAT MAF and Lambda sensors so I can rule out fuel air probs ?????????????????? I just wish it would throw up the ECM light

[Wombatbomb]

Why do you need the ECM light on? These cars store codes without throwing a light every time, it depends on the exact fault or the number of times the fault occurs in a defned time period.

[irf]

cbv split?

[mick1275]

Hi guys ere we goo again, Right ive spend 2 weeks testing everything to do wi vacuum to try to cure this strange boost problem. I replaced every rubber hose ,vac pipes ,new actuator pressure tested for leaks found 2 small ones .Also tried my friends boost control valve still no luck .Ive got a boost gauge on now and this is whats happening.Gears 1 and 2 i get 0 psi (no boost) no positive pressure, 3rd gear i get boost it tops at 8-9 psi max i have no idears left if i unplug the connector off the boost selornoid valve nothing different accurs no warning lights no difference in boost and i dont fancy having to take it to main dealers as im mechanically educated myself the problem is i cant get into the ecu to see whats goin on any idears guys pleaseeeeeeeeeeeeee

[leet5r]

Hi guys ere we goo again, Right ive spend 2 weeks testing everything to do wi vacuum to try to cure this strange boost problem. I replaced every rubber hose ,vac pipes ,new actuator pressure tested for leaks found 2 small ones .Also tried my friends boost control valve still no luck .Ive got a boost gauge on now and this is whats happening.Gears 1 and 2 i get 0 psi (no boost) no positive pressure, 3rd gear i get boost it tops at 8-9 psi max i have no idears left if i unplug the connector off the boost selornoid valve nothing different accurs no warning lights no difference in boost and i dont fancy having to take it to main dealers as im mechanically educated myself the problem is i cant get into the ecu to see whats goin on any idears guys pleaseeeeeeeeeeeeee

i 2 am havin simaler probs let me know when you find the problem m8