Barras Posted July 22, 2011 Share Posted July 22, 2011 G'day guys, i've been looking here for a while and finally decided to post a question. I don't know much myself about these cars but i'm trying to learn, anyway here is my question, i have a M35, when i floor it off the mark or when driving along and put the foot through the firewall the car goes onto limp mode, i then need to turn the car off remove the key start the car up again and continue on my way, i'm putting the car in for a service in the next couple of weeks and would like to be able to tell the mechanic what might need to be replaced to fix this. Any advice would be appreaciated. i was trying to wait until the next Vic cruise or even the SAU nationals when i could discuss these cars with others but need to get this resolved ASAP. Thanks Chris Link to comment https://www.sau.com.au/forums/topic/371717-limp-mode/ Share on other sites More sharing options...
Sunkist Posted July 22, 2011 Share Posted July 22, 2011 may have a leak in the airflow system. mine would limp above 5k rpm and i found it to be my suction pipe was loose. either that or the AFM. Link to comment https://www.sau.com.au/forums/topic/371717-limp-mode/#findComment-5926413 Share on other sites More sharing options...
iamhe77 Posted July 22, 2011 Share Posted July 22, 2011 I'd look at the AFM too. How "east" are you Barras? Link to comment https://www.sau.com.au/forums/topic/371717-limp-mode/#findComment-5926421 Share on other sites More sharing options...
scotty nm35 Posted July 22, 2011 Share Posted July 22, 2011 Could be many things, even the throttle pedal wiring can cause that... Link to comment https://www.sau.com.au/forums/topic/371717-limp-mode/#findComment-5926474 Share on other sites More sharing options...
iamhe77 Posted July 22, 2011 Share Posted July 22, 2011 Just working the odds Link to comment https://www.sau.com.au/forums/topic/371717-limp-mode/#findComment-5926585 Share on other sites More sharing options...
scotty nm35 Posted July 22, 2011 Share Posted July 22, 2011 would like to be able to tell the mechanic what might need to be replaced to fix this. If you need to tell him how to fix it, he isn't the man for the job. Have you worked out the codes yet? What mods do you have if any? Link to comment https://www.sau.com.au/forums/topic/371717-limp-mode/#findComment-5926615 Share on other sites More sharing options...
Barras Posted July 22, 2011 Author Share Posted July 22, 2011 Thanks guys i'll get him to check out the AFM, he was going to put it on the dyno to check what's going on but time didn't prevail. Iamhe77, from Forest Hill Have even looked at codes or anything like that, the missues just drives it to and from work and thats about it. Car is standard as far as i know except for dual DVD players in the headrests (just got the cable to run the DVD's through the front screen yesterday), Brembo brakes, Volk TE73's 245x40x19 tyres, and some sort of body kit on it, leather interior. (still working out how to reply to multiple messages) Link to comment https://www.sau.com.au/forums/topic/371717-limp-mode/#findComment-5926651 Share on other sites More sharing options...
scotty nm35 Posted July 22, 2011 Share Posted July 22, 2011 Is the engine light up? Link to comment https://www.sau.com.au/forums/topic/371717-limp-mode/#findComment-5926656 Share on other sites More sharing options...
Barras Posted July 22, 2011 Author Share Posted July 22, 2011 Is the engine light up? No, just the air bag light, i bought an adaptor through IM but it didn't fit. Link to comment https://www.sau.com.au/forums/topic/371717-limp-mode/#findComment-5926696 Share on other sites More sharing options...
iamhe77 Posted July 22, 2011 Share Posted July 22, 2011 When you say it goes into limp mode, does the yellow engine light appear? I am pretty sure that this will always light up when in limp mode... unless the globe has gone of course Link to comment https://www.sau.com.au/forums/topic/371717-limp-mode/#findComment-5926784 Share on other sites More sharing options...
Barras Posted July 22, 2011 Author Share Posted July 22, 2011 When you say it goes into limp mode, does the yellow engine light appear? I am pretty sure that this will always light up when in limp mode... unless the globe has gone of course Sorry yes it does. Link to comment https://www.sau.com.au/forums/topic/371717-limp-mode/#findComment-5926808 Share on other sites More sharing options...
Jetwreck Posted July 22, 2011 Share Posted July 22, 2011 Sorry yes it does. need to get the code. http://www.m35stagea.info/forum/viewtopic.php?f=6&t=11 get that code and it should tell you whats wrong. Link to comment https://www.sau.com.au/forums/topic/371717-limp-mode/#findComment-5926859 Share on other sites More sharing options...
Barras Posted July 22, 2011 Author Share Posted July 22, 2011 need to get the code. http://www.m35stagea...ic.php?f=6&t=11 get that code and it should tell you whats wrong. Thanks, i will give it a go next week when i get a chance. Link to comment https://www.sau.com.au/forums/topic/371717-limp-mode/#findComment-5926977 Share on other sites More sharing options...
66yostagea Posted July 23, 2011 Share Posted July 23, 2011 While mine is a C34, I had the same probs. With it being intermittent it was hard to diagnose. Turned out to be the AFM. Link to comment https://www.sau.com.au/forums/topic/371717-limp-mode/#findComment-5928063 Share on other sites More sharing options...
Barras Posted October 2, 2011 Author Share Posted October 2, 2011 OK the problem is the throttle position sensor, now i've just got to source one to test. Link to comment https://www.sau.com.au/forums/topic/371717-limp-mode/#findComment-6042076 Share on other sites More sharing options...
Commsman Posted October 3, 2011 Share Posted October 3, 2011 OK the problem is the throttle position sensor, now i've just got to source one to test. Would throttle re-learn procedure fix this? Even though it is used for idle speed, it may well fix it. The guys who have done this when cleaning out their throttle bodies may know...... In any case, it shouldn't take long to do the procedure. Info here: http://www.m35stagea.info/forum/viewtopic.php?f=6&t=206 Cheers, Leon. Link to comment https://www.sau.com.au/forums/topic/371717-limp-mode/#findComment-6042188 Share on other sites More sharing options...
zei20l Posted October 3, 2011 Share Posted October 3, 2011 remember there is a throttle position sensor on the pedal and one on the actual throttle itself - actually i think there are 2 on the throttle. if its only when you floor it, its possibly the one attached to the pedal Link to comment https://www.sau.com.au/forums/topic/371717-limp-mode/#findComment-6042198 Share on other sites More sharing options...
Commsman Posted October 3, 2011 Share Posted October 3, 2011 If you want to easily check what Iain suggested, get a multimeter, earth one probe and check the voltages on the wires with the other. The voltage on pins 2 & 5 should be linear all the way to the floor. A sudden change (drop off?) would indicate a faulty potentiometer. To get access you might need a pin to push thru the wires as the back of the connector is sealed. Link to comment https://www.sau.com.au/forums/topic/371717-limp-mode/#findComment-6042566 Share on other sites More sharing options...
scotty nm35 Posted October 3, 2011 Share Posted October 3, 2011 Its probably a dirty carbon track on the pot, there are two carbon tracks inside it. If you can pull it all apart and clean the tracks with contact cleaner it should be fine. Or just replace the throttle pedal sensor. Link to comment https://www.sau.com.au/forums/topic/371717-limp-mode/#findComment-6042707 Share on other sites More sharing options...
zei20l Posted October 3, 2011 Share Posted October 3, 2011 i remember reading somwhere that V35s and Z33s suffer from the throttle input sensor malfunction Link to comment https://www.sau.com.au/forums/topic/371717-limp-mode/#findComment-6042991 Share on other sites More sharing options...
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