Brick wall at 5k rpm??
19 April 2001, 08:38 PM
#1
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I've got a '94 WRX. Just had a ScoobySport exhaust put on, replacing my HKS.
Now, when the engine is under load, it cuts out for half a second at 5,000 rpm, and then picks up again??
Any ideas?
Help?
It's broken!
Now, when the engine is under load, it cuts out for half a second at 5,000 rpm, and then picks up again??
Any ideas?
Help?
It's broken!
19 April 2001, 08:54 PM
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Does it only happen in first gear ??
My MY96 does this if you accelerate really hard in 1st gear, but is fine if you accelerate slightly smoother, don't know what causes it though.
Stuart
My MY96 does this if you accelerate really hard in 1st gear, but is fine if you accelerate slightly smoother, don't know what causes it though.
Stuart
19 April 2001, 09:51 PM
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hi had exactly the same problem with my MY97 when i fitted my scoobysport downpipe,but i managed to split a vac hose while working on the car did'nt no i had done it,and it took about 4 days to find,on mine it was the little 3" long pipe to the actuater from the inlet manifold,its worth double and treble checking this as i missed it a few times,,
19 April 2001, 10:05 PM
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It is overboosting almost certainly.
Mine did this for a while after the dealer replaced a piston. The cause was a split in one of the hoses leading from the manifold to wastegate actuator.
Assuming you've checked the hoses amd they're ok, then stopping overboost is a little more difficult. Short of replacing the ECU or adding a piggyback ECU, changing the restrictor (small piece of brass with a small hole drilled through it, hidden inside one of the above hoses) for a slightly bigger one may cure things. Very small changes to the restrictor hole size affect its function so only change by increments of 0.1 mm at a time if you decide to try this.
D.
Mine did this for a while after the dealer replaced a piston. The cause was a split in one of the hoses leading from the manifold to wastegate actuator.
Assuming you've checked the hoses amd they're ok, then stopping overboost is a little more difficult. Short of replacing the ECU or adding a piggyback ECU, changing the restrictor (small piece of brass with a small hole drilled through it, hidden inside one of the above hoses) for a slightly bigger one may cure things. Very small changes to the restrictor hole size affect its function so only change by increments of 0.1 mm at a time if you decide to try this.
D.
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19 April 2001, 10:55 PM
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Steve,
You haven't had an oil change recently have you ? My STi 3 did this when I bought it. The garage had serviced it and filled the sump with too much oil. This then allows oil to contaminate the wastegate actuator. Cleaned it out with aerosol carb cleaner, dropped half a litre of oil from the sump and this sorted it. Look in the SIDC FAQ for more on this - it's a common problem.
Kevin.
You haven't had an oil change recently have you ? My STi 3 did this when I bought it. The garage had serviced it and filled the sump with too much oil. This then allows oil to contaminate the wastegate actuator. Cleaned it out with aerosol carb cleaner, dropped half a litre of oil from the sump and this sorted it. Look in the SIDC FAQ for more on this - it's a common problem.
Kevin.
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