Pettit Racing ported engine problem
10-13-2014, 08:52 PM
#1
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Pettit Racing ported engine problem
Hey guys so i have installed my brand new pettit racing renesis ported engine. i have installed everything an when i went to start it up it started fine. my issues started when i went to test drive it. i had no power/bogging at 5k rpm. got home, checked the code it threw and came up with p2004(intake manifold runner stuck wide open) i ordered the engine with a new polished intake manifold so we did not have to remove the apv at all.
when i went to check the magnet on the white gear it was not in the 1 o'clock fully clockwise position as i have read where it needs to be.
unless pettit racing does this on purpose, i think they may have made a mistake when lining up the gears in the manifold.
does anyone know if pettit does this on purpose or have they made an error?
when i went to check the magnet on the white gear it was not in the 1 o'clock fully clockwise position as i have read where it needs to be.
unless pettit racing does this on purpose, i think they may have made a mistake when lining up the gears in the manifold.
does anyone know if pettit does this on purpose or have they made an error?
10-13-2014, 08:58 PM
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An issue with power delivery at 5k just after an engine installation almost always ends up being incorrectly connected injectors, since you can connect them wrong, and it's easy to do.
The code is for the APV stuck open:
I would suspect that the misalignment of the APV, or perhaps a connection problem for it's harness would be cause of the code, but it wouldn't cause a bog at 5k. If anything, it would be down on power below the activation point, because the intake is shorter than is optimal for that RPM, so you would be getting too much air, and it would smoothly improve to be normal at it's activation point.
Two different issues here i bet.
The code is for the APV stuck open:
DTC P2004
APV stuck open
DETECTION CONDITION
The PCM monitors the input voltage from the APV position sensor when the PCM turns the APV motor off. If the input voltage is less than 1.5 V, the PCM determines that the APV is stuck open.
Diagnostic support note
This is a continuous monitor (CCM).
The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
FREEZE FRAME DATA is available.
The DTC is stored in the PCM memory.
POSSIBLE CAUSE
APV stuck open
APV control malfunction
APV motor malfunction
PCM malfunction
APV stuck open
DETECTION CONDITION
The PCM monitors the input voltage from the APV position sensor when the PCM turns the APV motor off. If the input voltage is less than 1.5 V, the PCM determines that the APV is stuck open.
Diagnostic support note
This is a continuous monitor (CCM).
The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
FREEZE FRAME DATA is available.
The DTC is stored in the PCM memory.
POSSIBLE CAUSE
APV stuck open
APV control malfunction
APV motor malfunction
PCM malfunction
Two different issues here i bet.
10-13-2014, 08:59 PM
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i would like to be able to call them but seeing as how they are in florida and im in california their hours of operation are open when im at work and they are always closed by the time i get off work.
10-13-2014, 09:01 PM
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I would suspect that the misalignment of the APV, or perhaps a connection problem for it's harness would be cause of the code, but it wouldn't cause a bog at 5k. If anything, it would be down on power below the activation point, because the intake is shorter than is optimal for that RPM, so you would be getting too much air, and it would smoothly improve to be normal at it's activation point.
10-13-2014, 09:04 PM
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It could, but it isn't a garuantee. If you left it completely disconnected, it would probably be P2009, APV low input, but a dirty connector or bent pin could prevent that voltage control problem, and instead cause another problem. Loose/poor connections are never a 100% sure thing on which code they might throw, if they throw one at all.
10-13-2014, 09:04 PM
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the alignment of the apv is def wrong if the magnet on the white gear has to be at the 1 o'clock position when fully closed. fully closed right now it is at about the 4 o'clock position.
should i perhaps try setting the white gear magnet at the 1 o'clock then installing the apv motor?
should i perhaps try setting the white gear magnet at the 1 o'clock then installing the apv motor?
10-13-2014, 09:15 PM
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Yes, the misalignment is most likely the cause of the P2004 code.
An injector connection order is most likely the cause of the bog.
Realigning the APV is going to be part of the Intake Manifold Disassembly/Assembly article in the factory service manual, and it has some details.
An injector connection order is most likely the cause of the bog.
Realigning the APV is going to be part of the Intake Manifold Disassembly/Assembly article in the factory service manual, and it has some details.
Install the APV using a new APV installation bolt.
Tightening torque
0.9—1.2 N·m {9.2—12 kgf·cm, 8.0—10 in·lbf}
2. Rotate the APV gear manually with the APV pointed perpendicular to the ground and verify that the APV can be rotated smoothly.
VDI Valve Installation Note
1. Apply grease to the VDI valve end as shown in the figure.
APV Motor Installation Note
1. Install the intake manifold. (See INTAKE MANIFOLD REMOVAL/INSTALLATION.)
2. Rotate the APV gear manually and verify that it can be rotated smoothly (approx. three-quarter rotation).
If the gear cannot be rotated smoothly, clean the internal ports of the housing and the areas around the APV.
3. Install a new gasket, APV motor and bracket.
Tightening torque
6.9—9.8 N·m {71—99 kgf·cm, 62—86 in·lbf}
Tightening torque
0.9—1.2 N·m {9.2—12 kgf·cm, 8.0—10 in·lbf}
2. Rotate the APV gear manually with the APV pointed perpendicular to the ground and verify that the APV can be rotated smoothly.
VDI Valve Installation Note
1. Apply grease to the VDI valve end as shown in the figure.
APV Motor Installation Note
1. Install the intake manifold. (See INTAKE MANIFOLD REMOVAL/INSTALLATION.)
2. Rotate the APV gear manually and verify that it can be rotated smoothly (approx. three-quarter rotation).
If the gear cannot be rotated smoothly, clean the internal ports of the housing and the areas around the APV.
3. Install a new gasket, APV motor and bracket.
Tightening torque
6.9—9.8 N·m {71—99 kgf·cm, 62—86 in·lbf}
10-13-2014, 09:27 PM
#9
Driving my unreliable rx8
If your apv valve is misaligned it is an internal gear that needs to be adjusted for the fine adjustment. Its extremely difficult to do while in the car but not impossible. Otherwise you'll need to pull the engine and remove the manifold to correct that.
10-13-2014, 10:18 PM
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when i drive it, if i increase throttle and let the rpms rise slowly, it does fine, but if i try to get on it after ~4.5k a bit it doesnt want to go and seems as if its running too rich.
i guess ill have to call pettit first thing in the morning.
i guess ill have to call pettit first thing in the morning.
Last edited by AJ312; 10-13-2014 at 10:24 PM.
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