So my car is RS2ued real time tuned from Minhea and lately it has been doing this weird boost problem. If i stomp on it at say 45mph or 50mph in third gear the boost pressure climbs to 30psi and bam big buck.I let off a little and the car goes fine but at about 25psi. It use to just go.The same thing is true for 4th gear at like 60 or 70mph. I have replaced spark plugs because they had 10000 miles on them. I have check for vaccum leaks and boost hose leaks thinking i am hitting over boost cut out but i have not found anything?
-
-
Check coil packs.
-
Try to reduce the electrode opening to 0.6 mmComment
-
Sounds very similar to my problem. First and second gear fine?3'' Longlife Exhaust, Koni Adjustables, H&R Springs, Full RS2 Setup with Mr Nugents RS2 Chips
(just need the RS2 Airbox)Comment
-
dont do anything to the spark plugs. The bosch ones cannot be adjusted anyway and they are 0.6mm width anyway.
this is likely to be a coil, spark plug pipe or POS problem.
It could also be a tiny boost leak leading to overboost and then cutting out.(fuel cut). Is the bump abrupt and severe? or just a mild misfire?Comment
-
i think i finally found it the hose under the throttle body t hose... was cracked and if i flexed it it would leak a little. STill get a miss if i nail it in 4th gear at 65 mph but i think at that instant i am hitting over boost cut out. My boost guage slams into 30psi and that is as high as my guage reads. No other boost leaks found though...Comment
-
Make sure and reset ECU after fixing boost leaks... is it bringing up any fresh fault codes ?Paul Nugent
Webmaster http://S2central.net
Administrator http://S2forum.com
1994 S2 Coupe ABY - aka Project Lazarus
2001 A6 allroad 2.5TDi - family tank
2003 S4 Avant 4.2 V8 - daily burble
Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)
There are only 10 kinds of people that understand binary - those that do, and those that don't
Comment
-
no codes. The only time i get a code is if i don't shift fast enough and hit the limiter. I have not reset the ecu yet. i will do thatComment
-
I re-set my ECU no change. It feels like it hits over boost cut out. I think i am going to fill with race gas and see what happens. I am also going to try running on my race gas program instead of my 93 octane too and see what happens.Comment
-
edit. it only does it at 65mph when i floor it in fourth gear and 80-85 in 5th gear. If i am doing 70mph it doesn't do it same with if i am at 95 mphComment
Comment