2003 S80 T6 Throttle Pulses

johnstds · Post by **johnstds** » 10 Jun 2014, 14:54

Hello, I bought a 2003 Volvo S80 T6 in January. I love the car (when it is working correctly). One issue that it recently developed is that when I press the throttle more than about half way the throttle pulses... on off.. on off... I'm not sure what is causing this and I haven't had a chance to really look at the car yet... school keeps me busy. When I put injector cleaner in it the car seems to run better but the issue doesn't fully go away but that might just be a placebo. Any help would be appreciated.

matt5112 · Post by **matt5112** » 11 Jun 2014, 04:40

What's likely happening is the boost is fluctuating.

This can be caused by a charge air tube leak, TCV getting weak/clogged, etc.

Chasing leaks the old fashioned way only works for the biggest of leaks, if that. The ME7 is that good at hiding it. Next best thing is to build one of these:

TCV is hit and miss on the aftermarket stuff. The current trend is to go for the OE valve.

johnstds · Post by **johnstds** » 02 Jul 2014, 12:42

Thanks,

I replaced the TCV and that fixed it.