The turbo turd
Thread Starter
|
Junior Member
Joined: May 2025
Posts: 10
The turbo turd
It's a 2005 pt cruiser 2.4l turbo. Having issues with idling, and running smooth. Replaced the battery with a brand new one started and ran good not perfect but ran kinda smooth, drove it and it did a lot better than expected. Slow to build boost but done good. Swapped out the spark plugs with new ones and it ran terrible, wouldn't idle, barely would start. Left it alone for a few days went to start it again and basically same results tho I did discover the serpentine belt slide off the pulleys, left it alone again for a few more days first turn of the key it didn't turn over, after pumping the gas as I was trying and it fired up and ran smooth again but wouldn't idle for long before it died, has over a half of a tank of new 93 Octane gas with injector cleaner. Any ideas????
Thread Starter
|
Junior Member
Joined: May 2025
Posts: 10
what exactly do you mean? Like I'm getting a scanner tomorrow so I can see what codes it has. Fuel adaptive data???
Senior Member
Joined: Oct 2020
Posts: 586
From: Chicago, IL
Were the OE Champion copper spark plugs used as replacements? The 2.4l, particularly the turbo, run best on the Champion RE16mc gapped at .040in. Iridiums, in particular, are know to not work well with the turbo.
It is recommended that the spark plugs wires be replaced every 60,000 miles, or every 2nd spark plug change.
.
It is recommended that the spark plugs wires be replaced every 60,000 miles, or every 2nd spark plug change.
.
Thread Starter
|
Junior Member
Joined: May 2025
Posts: 10
Were the OE Champion copper spark plugs used as replacements? The 2.4l, particularly the turbo, run best on the Champion RE16mc gapped at .040in. Iridiums, in particular, are know to not work well with the turbo.
It is recommended that the spark plugs wires be replaced every 60,000 miles, or every 2nd spark plug change.
.
It is recommended that the spark plugs wires be replaced every 60,000 miles, or every 2nd spark plug change.
.
Here are the codes its currently got
Thread Starter
|
Junior Member
Joined: May 2025
Posts: 10
that's the plan is to eventually just do away with the cats all together and just weld a bung in for the o2 sensor into a piece of pipe. But does anyone know about the 2.4l turbo that's in the dodge neon srt4s? I have a theory thanks to some info I was reading. If anyone knows anything about that car and the engine let me know.
Senior Member
Joined: Oct 2020
Posts: 586
From: Chicago, IL
The fact the vehicle ran poorly after the spark plugs were changed suggests to me the spark plugs are incorrect, the spark plug wires bad, or possibly a failing coil pack (not typical).
Circuit high indicates an open circuit (high resistance), e.g. broken wire or corroded connector
Circuit low indicates a possible short (low resistance), e.g. melted wire insulation exposing the copper core.
This suggests a wiring issue, possibly in the harness running to the O2 sensors. Look for rub-throughs or melted wires.
Remove and clean the ground points on the driver side strut tower. They may look good but are known to cause issues.
The P0700 tcm code is a generic transmission code to trigger the check engine lamp. There will be a more specific code(s) in the in the transmission module itself (P07xx).
Removing the cat will throw a cat inefficiency code and light the check engine lamp as there will not be a significant difference between the upstream and downstream O2 sensors. Note removing the cat is a violation of federal law.
Pumping the gas pedal does not increase the amount of gas (as it would for carburetors). Does spraying starting fluid or throttle body cleaner into the intake allow the engine to fire? This suggests an issue with fuel delivery (possible failing fuel pump). Might be necessary to check fuel pressure (loaner kits available from many auto parts stores).
No crank issue after a few days suggests a parasitic drain on the battery. If the vehicle has fog lamps, suggest pulling the fog lamp fuse, #8, in the cabin fuse box. The steering column multi-function switch has been know to fail in the fog lamp circuit and drain the battery.
Circuit high indicates an open circuit (high resistance), e.g. broken wire or corroded connector
Circuit low indicates a possible short (low resistance), e.g. melted wire insulation exposing the copper core.
This suggests a wiring issue, possibly in the harness running to the O2 sensors. Look for rub-throughs or melted wires.
Remove and clean the ground points on the driver side strut tower. They may look good but are known to cause issues.
The P0700 tcm code is a generic transmission code to trigger the check engine lamp. There will be a more specific code(s) in the in the transmission module itself (P07xx).
Removing the cat will throw a cat inefficiency code and light the check engine lamp as there will not be a significant difference between the upstream and downstream O2 sensors. Note removing the cat is a violation of federal law.
Pumping the gas pedal does not increase the amount of gas (as it would for carburetors). Does spraying starting fluid or throttle body cleaner into the intake allow the engine to fire? This suggests an issue with fuel delivery (possible failing fuel pump). Might be necessary to check fuel pressure (loaner kits available from many auto parts stores).
No crank issue after a few days suggests a parasitic drain on the battery. If the vehicle has fog lamps, suggest pulling the fog lamp fuse, #8, in the cabin fuse box. The steering column multi-function switch has been know to fail in the fog lamp circuit and drain the battery.
Last edited by ggoose; Jun 16, 2025 at 10:20 AM.
Thread Starter
|
Junior Member
Joined: May 2025
Posts: 10
The fact the vehicle ran poorly after the spark plugs were changed suggests to me the spark plugs are incorrect, the spark plug wires bad, or possibly a failing coil pack (not typical).
Circuit high indicates an open circuit (high resistance), e.g. broken wire or corroded connector
Circuit low indicates a possible short (low resistance), e.g. melted wire insulation exposing the copper core.
This suggests a wiring issue, possibly in the harness running to the O2 sensors. Look for rub-throughs or melted wires.
Remove and clean the ground points on the driver side strut tower. They may look good but are known to cause issues.
The P0700 tcm code is a generic transmission code to trigger the check engine lamp. There will be a more specific code(s) in the in the transmission module itself (P07xx).
Removing the cat will throw a cat inefficiency code and light the check engine lamp as there will not be a significant difference between the upstream and downstream O2 sensors. Note removing the cat is a violation of federal law.
Pumping the gas pedal does not increase the amount of gas (as it would for carburetors). Does spraying starting fluid or throttle body cleaner into the intake allow the engine to fire? This suggests an issue with fuel delivery (possible failing fuel pump). Might be necessary to check fuel pressure (loaner kits available from many auto parts stores).
No crank issue after a few days suggests a parasitic drain on the battery. If the vehicle has fog lamps, suggest pulling the fog lamp fuse, #8, in the cabin fuse box. The steering column multi-function switch has been know to fail in the fog lamp circuit and drain the battery.
Circuit high indicates an open circuit (high resistance), e.g. broken wire or corroded connector
Circuit low indicates a possible short (low resistance), e.g. melted wire insulation exposing the copper core.
This suggests a wiring issue, possibly in the harness running to the O2 sensors. Look for rub-throughs or melted wires.
Remove and clean the ground points on the driver side strut tower. They may look good but are known to cause issues.
The P0700 tcm code is a generic transmission code to trigger the check engine lamp. There will be a more specific code(s) in the in the transmission module itself (P07xx).
Removing the cat will throw a cat inefficiency code and light the check engine lamp as there will not be a significant difference between the upstream and downstream O2 sensors. Note removing the cat is a violation of federal law.
Pumping the gas pedal does not increase the amount of gas (as it would for carburetors). Does spraying starting fluid or throttle body cleaner into the intake allow the engine to fire? This suggests an issue with fuel delivery (possible failing fuel pump). Might be necessary to check fuel pressure (loaner kits available from many auto parts stores).
No crank issue after a few days suggests a parasitic drain on the battery. If the vehicle has fog lamps, suggest pulling the fog lamp fuse, #8, in the cabin fuse box. The steering column multi-function switch has been know to fail in the fog lamp circuit and drain the battery.