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Car won't go above 2500 rpm sometimes w/ video
Hey guys, I know there has been a lot of topics on this but I feel like I'm having a little different problem. I just bought my 08 350z about a month ago. Just recently I got used to the aftermarket clutch and flywheel so I have been going pretty hard on it. Just last week I was doing a highway pull and when I let off I realized the car wasn't letting me go past 2500rpm. It doesn't happen all the time, only sometimes when I redline a couple of gears. Whats weird is that once I turn the car off for about 10 seconds and turn it back on everything is fine. I did my research and saw people suggesting maf sensor. I have custom air intakes if that helps at all. Please let me know what you think or if anyone has the same issue.
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If you're using filter oil on your air filters, it couldn't hurt to clean the MAF sensors. I'm kind of surprised you're not getting a CEL for something like what you're experiencing. For what it's worth, Nissan put a lot of R&D into the factory intakes, and you're not going to do much better with an aftermarket version short of a CAI that's going to be way more expensive than it's worth considering what you get in return.
The problem could also be a bad TPS, but again, your car should be throwing a code for something like that. |
Zakmartin thanks for the quick reply! According to the previous owner, he was able to achieve maximum hp output with a custom air intake and custom exhaust. He provided me with dyno sheets and currently has the car tuned to 295whp. I have a cobb accessport I am going to be plugging in soon and see if it will say anything. Again, thanks for the reply.
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No problem. It would have been helpful if you stated in your first post that your car was set up for a piggy-back computer that may or may not still be on the vehicle.
There are many threads re: Cobb Accessport issues: https://my350z.com/forum/tuning/3821...rt-so-far.html https://my350z.com/forum/tuning/5658...need-help.html You have some reading ahead of you. |
Originally Posted by George's350z
(Post 10667030)
Zakmartin thanks for the quick reply! According to the previous owner, he was able to achieve maximum hp output with a custom air intake and custom exhaust. He provided me with dyno sheets and currently has the car tuned to 295whp. I have a cobb accessport I am going to be plugging in soon and see if it will say anything. Again, thanks for the reply.
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Thank you for your help guys. But the tune and custom filter and exhaust were all done by a performance shop here in florida. Nothing was done amaturelly. The car runs beautifully and is very fun to drive. Its just this rpm problem I'm trying to figure out and why it only happens when it wants too. Today I was flooring the **** out of it and everything was fine.
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you prob have a small vacuum leak on the intake or something.... i had a pair that did that, it just didnt like them, sometimes it would be fine and others go into limp mode like yours is
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Originally Posted by George's350z
(Post 10667749)
Thank you for your help guys. But the tune and custom filter and exhaust were all done by a performance shop here in florida. Nothing was done amaturelly. The car runs beautifully and is very fun to drive. Its just this rpm problem I'm trying to figure out and why it only happens when it wants too. Today I was flooring the **** out of it and everything was fine.
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Originally Posted by dboyzalter
(Post 10667791)
Ive see lots of cars that wont rev past whatever rpm but they usually throw a code and a restart doesn't solve their problems. These cars usually have a clogged intake or a clogged catalytic converter. Or other blockage of air in or out. Dont know how your not throwing a code. Do you have an obd2 scanner? Does the car still have catalytic converters? Is the car just using the factory ecu now?
I have an accessport. That can be used as a scanner righr? The car does have catalytic converters. And it is using the factory ecu. |
Originally Posted by dboyzalter
(Post 10667791)
These cars usually have a clogged intake or a clogged catalytic converter.
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Originally Posted by zakmartin
(Post 10667994)
I couldn't agree more on the cats. They factory ones are garbage.
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LOL! George, if you can think of ANYTHING else that's aftermarket that could be causing the problem, list it in your next post.
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Alright so I talked to the person who tuned my car and it turns out that he is the owner of the performance shop and he was involved in the whole process of the car. The previous owner seemed to be a horsepower freak and was trying to compete with a couple of his friends (like we all do) and slapped on gigantic custom air filters and had the shop tune the car to calibrate the extra air. It supposedly took the tuner all night to get the car tuned perfectly so thats where I will be starting. I want the car to run healthy so I will be slapping on some aftermarket air filters or possibly the stock ones back on and have the car retuned for the custom exhaust only. So that should rule out the air filter problem.
He also mentioned that these cars often have throttle body syncing issues after a tune up and it might be that both of the throttle bodies aren't syncing up with the throttle and it puts it into limp mode. With the stock or aftermarket air filter and a retune should take care of that problem as well. Roger (the owner/tuner) also suggested cam position sensor but we quickly ruled that out because the computer should through a code for that and the car usually acts differently if the cam position sensor is messed up. I plugged my accessport in and ran diagnostic and codes P0131 and P0151 popped up for O2 sensor bank 1 and 2. Roger mentioned that was weird that they both are acting up at the same time cause that usually doesn't happen. Neither do these codes relate to the problem I am having but Its good to find out about it (not really/more work lol). Most important piece of information I got from roger is the oil temperature sensor. He says that the hr engines came with an oil temp sensor and if that is acting up and tells the computer that the oil is warming up above its average temp, it would cause the car to go into limp mode. Just thought I'd keep you guys posted since you are helping. I will be getting my hands dirty sometime next week after I'm done with these ******** college responsibilities and hopefully my baby runs good and I can drive it hard again. haha Thanks guys! |
Originally Posted by silverbullet_Z
(Post 4412296)
[edit] Engine Codes
P0000 No Self Diagnostic Failure Indicated P0011 Intake Valve Timing Control P0021 Intake Valve Timing Control P0031 O2 Sensor Heather P0032 O2 Sensor Heather P0037 O2 Sensor Heather P0038 O2 Sensor Heather P0043 O2 Sensor Heather P0044 O2 Sensor Heather P0051 O2 Sensor Heather P0052 O2 Sensor Heather P0057 O2 Sensor Heather P0058 O2 Sensor Heather P0100 MAF (Mass Air Flow) Sensor P0101 MAF Sensor P0102 MAF Sensor P0103 MAF Sensor P0105 Absolute Pressure Sensor P0107 Absolute Pressure Sensor P0108 Absolute Pressure Sensor P0110 IAT (Intake Air Temperature) Sensor P0112 IAT Sensor P0113 IAT Sensor P0115 ECT (Engine Coolant Temperature) Sensor P0117 ECT Sensor P0118 ECT Sensor P0120 TP (Throttle Position) Sensor P0121 TP Sensor P0122 TP Sensor P0123 TP Sensor P0125 ECT Sensor P0127 Intake Air Temperature Sensor P0128 Thermostat Function P0130 Closed Loop, Bank 1 Or Front O2S, Bank 1 P0131 Front O2 Sensor, Bank 1 Lean Shift Monitoring P0132 Front O2 Sensor, Bank 1 Rich Shift Monitoring P0133 Front O2 Sensor, Bank 1 Response Monitoring P0134 Front O2 Sensor, Bank 1 High Voltage P0135 Front HO2S Heater, Bank 1 P0136 Rear O2S, Bank 1 P0137 Rear O2S, Bank 1 Minimum Voltage Monitoring P0138 Rear O2S, Bank 1 Maximum Voltage Monitoring P0139 Rear O2S, Bank 1 Response Monitoring P0140 Rear O2S, Bank 1 High Voltage P0141 Rear H02S Heater, Bank 1 P0144 O2 Sensor Heather P0150 Closed Loop, Bank 2 Or Front O2S, Bank 2 P0151 Front O2 Sensor, Bank 2 Lean Shift Monitoring P0152 Front O2 Sensor, Bank 2 Rich Shift Monitoring P0153 Front O2 Sensor, Bank 2 Response Monitoring P0154 Front O2 Sensor, Bank 2 High Voltage P0155 Front HO2S Heater, Bank 2 P0156 Rear H02S Sensor, LH Bank P0157 Rear O2S, Bank 2 P0158 Rear O2S, Bank 2 P0159 Rear O2S, Bank 2 P0160 Rear O2S, Bank 2 P0161 Rear H02S Heater, LH Bank Or Bank 2 P0171 Fuel System Lean, Bank 1 P0172 Fuel System Rich, Bank 1 P0174 Fuel System Lean, Bank 2 P0175 Fuel System Rich, Bank 2 P0180 Tank Fuel Temp Sensor P0182 Fuel Tank Temperature Sensor P0183 Fuel Tank Temperature Sensor P0217 Engine Coolant High Temperature Enrichment Protection P0221 Throttle Position Sensor P0222 Throttle Position Sensor P0223 Throttle Position Sensor P0226 Accelerator Pedal Position Sensor P0227 Accelerator Pedal Position Sensor P0228 Accelerator Pedal Position Sensor P0245 Supercharger Bypass Valve Control Solenoid Valve P0300 Random Misfire P0301–*P0308 Misfire, Cylinder No. 1–8 P0325 Knock Sensor, Bank 1 P0327 Knock Sensor P0328 Knock Sensor P0330 Knock Sensor, Bank 2 P0335 CKP (Crank Shaft Position) Sensor P0340 CMP (Cam Shaft Position) Sensor (Phase) P0345 CMP Sensor (Phase) P0350 Ignition Signal P0400 EGR System P0402 EGRC/BPT Valve P0403 EGR Volume Control Valve Circuit P0405 EGR Temperature Sensor P0406 EGR Temperature Sensor P0420 TW (Two-Way) Catalyst System, Bank 1 P0430 TW Catalyst System, Bank 2 P0440 EVAP Small Leak P0441 EVAP Control System Purge Flow Monitor P0442 EVAP Control System P0443 Purge Control/V & S/V P0444 EVAP Canister Purge Volume Control Solenoid Valve P0445 EVAP Canister Purge Volume Control Solenoid Valve P0447 EVAP Canister Vent Control Valve P0450 EVAP Pressure Sensor P0451 EVAP System Pressure Sensor P0452 EVAP System Pressure Sensor P0453 EVAP System Pressure Sensor P0455 EVAP Control System P0456 EVAP Control System P0460 Fuel Level Sensor Unit (Slow) P0461 Fuel Level Sensor Function P0462 Fuel Level Sensor P0463 Fuel Level Sensor P0464 Fuel Level Sensor Circuit P0500 Vehicle Speed Sensor P0505 IACV/AAC Valve P0506 Idle Speed Control System P0507 Idle Speed Control System P0510 Closed TP Sensor P0550 Power Steering Pressure Sensor P0600 A/T Comm Line P0605 ECM/ECU P0650 Malfunction Indicator Lamp P0705 PNP Or Inhibitor Switch P0710 ATF Temp Sensor P0720 VSS A/T P0725 Engine Speed Signal P0731 A/T 1ST Signal P0732 A/T 2ND Signal P0733 A/T 3RD Signal P0734 A/T 4TH Signal Or TCC P0740 TCC SV Solenoid P0744 A/T TCC Signal P0745 Line Pressure S/V P0750 Shift Solenoid/V A P0755 Shift Solenoid/V B P1031 Air/Fuel Ratio Sensor Meter P1032 Air/Fuel Ratio Sensor Meter P1065 ECM Power Supply Heater P1102 Mass Air Flow Sensor Function Heater P1103 MAP Sensor Heater P1104 MAP Sensor Heater P1105 MAP/BARO Switch SOL/V P1108 MAP Sensor Heater P1110 Intake Valve Timing Control, LH Bank P1111 Intake Valve Timing Control Solenoid Valve P1119 Radiator Temperature Sensor Circuit P1120 TP Sensor 2 P1121 Electronic Throttle Control Actuator P1122 Electronic Throttle Control Actuator P1124 Throttle Control Motor Relay P1125 Tandem TP Sensor P1126 Throttle Control Motor Relay P1128 Throttle Control Motor P1130 Swirl Control Valve Control Solenoid Valve P1131 Swirl Control Solenoid Valve P1132 Swirl Control Valve P1135 Intake Valve Timing Control, RH Bank 2 P1136 Intake Valve Timing Control Solenoid Valve P1137 Swirl Control Valve Position Sensor P1138 Swirl Control Valve P1140 Intake Valve Timing Control Position Sensor, LH Bank 1 P1143 Heated O2 Sensor 1 P1144 Heated O2 Sensor 1 P1145 Intake Valve Timing Control Position Sensor, RH Bank 2 P1146 Heated O2 Sensor 2 P1147 Heated O2 Sensor 2 P1148 Closed Loop, Bank 1 P1163 Heated O2 Sensor 1 P1164 Heated O2 Sensor 1 P1165 Swirl Control Valve Control Vacuum Check Switch P1166 Heated O2 Sensor 2 P1167 Heated O2 Sensor 2 P1168 Closed Loop, Bank 2 P1169 Heated O2 Sensor 3 P1170 Heated O2 Sensor 3 P1210 Traction Control Signal Circuit P1211 ABS/TCS Control Unit P1212 ABS/TCS Communication Line P1217 Engine Coolant Temperature P1220 FPCM P1221 Throttle Actuator Circuit P1222 Temperature Sensor Circuit P1223 Throttle Position Sensor 2 P1224 Throttle Position Sensor 2 P1225 Closed Throttle Position Learning P1226 Closed Throttle Position Learning P1227 Accelerator Pedal Position Sensor 2 P1228 Accelerator Pedal Position Sensor 2 P1229 Sensor Power Supply P1271 Air/Fuel Ratio Sensor 1 P1272 Air/Fuel Ratio Sensor 1 P1273 Air/Fuel Ratio Sensor 1 P1274 Air/Fuel Ratio Sensor 1 P1276 Air/Fuel Ratio Sensor 1 P1278 Air/Fuel Ratio Sensor 1 P1279 Air/Fuel Ratio Sensor 1 P1320 Ignition Signal, Primary P1335 CKP Sensor (Ref) P1336 CKP Sensor (POS) Cog P1400 EGRC Solenoid/V P1401 EGR Temp Sensor P1402 EGR System P1440 EVAP Small Leak P1441 VC/V Bypass/V P1443 Canister Control Vacuum Check Switch P1444 Purge Volume Control/V P1445 Purge Volume Control/V P1446 Vent Control Valve P1447 EVAP Purge Flow P1448 Vent Control Valve P1456 EVAP Control System P1464 Fuel Level Sensor Circuit Ground Signal P1480 Fan Control Solenoid Valve Circuit P1490 VC/V Bypass/V P1491 VC Cut/V Bypass/V P1492 Purge Control/V S/V P1493 Purge Control/V & S/V P1564 ASCD Steering Switch P1568 ICC (Intelligent Cruise Control) P1572 ASCD (Automatic Sped Control Device) Brake Switch P1574 ASCD Vehicle Speed Sensor P1605 A/T Diag Comm Line P1610 NATS Malfunction P1611 NATS Malfunction P1612 NATS Malfunction P1613 NATS Malfunction P1614 NATS Malfunction P1615 NATS Malfunction P1705 TP Sensor A/T P1706 PNP Switch P1720 Vehicle Speed Sensor- A/T Output P1760 Overrun Clutch S/V P1775 Torque Converter Clutch Solenoid Valve P1776 Torque Converter Clutch Solenoid Valve P1780 Shift Change Signal P1800 VIAS Control Solenoid Valve P1805 Brake switch P1900 Cooling Fan P2122 Accelerator Pedal Position Sensor P2123 Accelerator Pedal Position Sensor P2127 Accelerator Pedal Position Sensor 2 P2128 Accelerator Pedal Position Sensor 2 P2135 Throttle Position Sensor P2138 Accelerator Pedal Position Sensor hope that will work for ya.. I wouldn't be surprised if your custom cats are aka test pipes. You should post pictures of the intake set up. We like seeing things on here |
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those look like the Takeda intakes, with larger filters
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