Diagnosing air leaks
#1
Diagnosing air leaks
Hi,
I'm test driving my 2003 R53 after changing oil in the supercharger and doing some other maintenance while it was in front end service mode.
The engine has a whistle, the check engine light came on, and the idle fluctuates. I think I have an air leak, but there are a lot of potential candidates.
I tried using an unlit burnzomatic torch to see if I could identify the leak, but it didn't make engine speed up or slow down. No matter where I held it. This has worked on carbureted vehicles for me in the past.
I was thinking about spraying carburetor cleaner on the intercooler boots, throttle body, etc. Does anyone have any other suggestions? I'll try to see what codes the engine is throwing when I get home.
Thanks
I'm test driving my 2003 R53 after changing oil in the supercharger and doing some other maintenance while it was in front end service mode.
The engine has a whistle, the check engine light came on, and the idle fluctuates. I think I have an air leak, but there are a lot of potential candidates.
I tried using an unlit burnzomatic torch to see if I could identify the leak, but it didn't make engine speed up or slow down. No matter where I held it. This has worked on carbureted vehicles for me in the past.
I was thinking about spraying carburetor cleaner on the intercooler boots, throttle body, etc. Does anyone have any other suggestions? I'll try to see what codes the engine is throwing when I get home.
Thanks
#2
Join Date: Nov 2021
Location: Under the car. As per normal.
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quick visual list while waiting for codes:
throttle body vacuum hose attached
intercooler boots (especially underneath)
intercooler discharge horn tight to the intake
vacuum lines seated on supercharger intake pipe [brake booster and TMAP sensor]
fuel pressure regulator vacuum line under the supercharger discharge / intercooler intake horn
Other than that and depending on what the codes tell you it might be smoke test time.
throttle body vacuum hose attached
intercooler boots (especially underneath)
intercooler discharge horn tight to the intake
vacuum lines seated on supercharger intake pipe [brake booster and TMAP sensor]
fuel pressure regulator vacuum line under the supercharger discharge / intercooler intake horn
Other than that and depending on what the codes tell you it might be smoke test time.
Last edited by Daftlad; 10-14-2023 at 05:35 AM.
#3
quick visual list while waiting for codes:
throttle body vacuum hose attached
intercooler boots (especially underneath)
intercooler discharge horn tight to the intake
vacuum lines seated on supercharger intake pipe [brake booster and TMAP sensor]
fuel pressure regulator vacuum line under the supercharger discharge / intercooler intake horn
Other than that and depending on what the codes tell you it might be smoke test time.
throttle body vacuum hose attached
intercooler boots (especially underneath)
intercooler discharge horn tight to the intake
vacuum lines seated on supercharger intake pipe [brake booster and TMAP sensor]
fuel pressure regulator vacuum line under the supercharger discharge / intercooler intake horn
Other than that and depending on what the codes tell you it might be smoke test time.
#4
Join Date: Nov 2021
Location: Under the car. As per normal.
Posts: 490
Received 201 Likes
on
162 Posts
The code I'm getting is 1242: Pressure sensor, intake manifold before compressor-input too low with trailing throttle.
In case this helps, from
Last edited by Daftlad; 10-15-2023 at 05:36 AM.
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