okie i dont know if this topic has ever been covered. so i appologize ahead of time..im in dire need of a lil help tho.
my car is taching out at 6400. stock is 7400. i do not know why it started doing this. the ecu is NOT throwing ANY codes. ive tried everything. disconnecting the vafc, setting everything back to stock settings, hard wiring the ecu, checking all fuses, checking all parts to see if they are connected or didnt come loose....thing is...i would be able to get this problem taken care of if i just had a code to work with. dealer is boggled....i work at a performance shop and they are boggled too..... ecu is not fried....hard wiring it deemed it okay....does anyone have a clue as to why this might be happening???? if something goes wrong on the car....do yuo have to have the dealer reset the ecu (like on mustangs and what not???) so that the car will go back to normal mode?
any ideas or input would be greatly appeciated. thanks!
The same odd occurence happened to my lude before. About a yr or 2 ago, I tapped into one of the gauge cluster wires for my indiglo's. After that, my car went into limp mode with no mil codes or anything. Then i disconnected the wire and relocated it, then things were good again.
Not really sure if this will help you, but that was my experience. My guess is some electrical oddity causing it.
have you tried checking the VTEC selenoid?......My VTEC selenoid went out a couple years back....it didn't throw any codes....and it cut around 6k too......then i check the selenoid and replaced it....and everything was fine again....just a thought that popped into my head.
thanks everyone for the input. i didnt think that the dealer had to reset our ecu.
im going to check into the gauges wires tho...since i did just have gauges installed. but i was also thinking that it had something to do with the ignition recall on our cars. i have an appointment to take it in to get that taken care of.
thanks again at least i have something to look into now.
Originally posted by dvsracergirl thanks everyone for the input. i didnt think that the dealer had to reset our ecu.
im going to check into the gauges wires tho...since i did just have gauges installed. but i was also thinking that it had something to do with the ignition recall on our cars. i have an appointment to take it in to get that taken care of.
thanks again at least i have something to look into now.
preludeshlude...where in san jose are you?
Hi Tif.. this is Victor. I talked to Aki on Saturday, and he said he fixed it already by changing the fuse location. Is it still not working? Let me know if you still need the helms, k? My roommate can help me bring it down to Aki tomorrow if you need it.
Hows all your levels? Fluids, oil and what not. I know my Prelude will tach out really early if my fluids are low or if I cold start it and try and run it too hard to fast.
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Jon Baker
Leaking oil? No thats just sweat from all the horsepower...
victor, this is natalie hehehe tiff was the girl with me with the civic si. but hehe you just had a brain fart :P i forgot you were on PO. im just so used to seeing you at the shop. how is your car doing now??? did we get everything taken care of?
if you still have the helms manual that would so great!!!!!!!!!! i was gonna give you a call tomorrow to see if you could bring it down. we fixed the problem with the car not starting, but not the ecu limpmode problem. hahaha that guy put the acgs fuse in the rear speaker slot. and thats why i wasnt getting power to my vafc or my fuel pump. that problem came LONG after the ecu one. the reason it wouldnt start was stupid, because we thought a blown fuse was causing the ecu problem, and then it just got put back in the wrong spot. cant wait for my gauges to be finished!!!!! ill make sure to post pics of it when theyre done...since they are a headache.
jon: i recently changed my oil and checked all my levels...and everything seems okie...i was low on oil and reset the ecu....everything was fine...untill last friday. victor actually mentioned that to me also.
argh just so frustrating....i hate it when lil things go wrong and set off a chain reaction.
i havent fixed the problem yet...i guess that i will work on it when i get to the shop tomorrow. i know it has something to do with wiring, as to why its not throwing a code...thats whats got me wondering. thanks again everyone.
i had the same problem with my car turned out the vtec output wire on the vafc came loose just resoldered it and i was good to go. It is probably a vtec problem like someone said. Listen and try to hear if your vtec kicks in.
I'm thinking your vtec solenoid may be bad. The only way it would throw a code for the vtec solenoid is if there was an open or a short in the wiring or if internally the solenoid for whatever reason was not grounding out as it should. The ECM would know this because when not engaged the ECM monitors the wire, and if it sees a resistance out of the range of 14-30 ohms, then the vtec code (22) is thrown. However, there can be something physically wrong with the solenoid but no open or short, in which case a code would not be thrown. If vtec does not engage, the ECM will cut fuel at ~6500 rpm. I haven't been able to figure out how the ECM would know if vtec did not engage. Peep this out. I have my PMS wired so that I can control the vtec engagement point. I've ran the ECM side of the solenoid to ground through a resistor so that the ECM thinks it's still connected to the solenoid, while I've ran the solenoid side of the wire to my PMS unit. As far as the ECM "knows" it is still connected to the solenoid, because the proper resistance is there. However, I can choose to not engage vtec, and I hit the fuel cutoff at ~6500 rpm. I have no idea how the ECM knows that vtec has not engaged, and I haven't been able to figure this out in the Helm. In fact, at 5200 rpm the ECM is still sending voltage through its solenoid wire and through my resistor to ground. There is no "sensor" to give the ECM feedback that the high cam lobes have actually engaged, so I don't get how it knows that vtec has not engaged. Long story short, I would try replacing the solenoid if you have made sure that all the wiring is fine.
Last edited by sharkcohen; 01-22-2003 at 10:36 PM.
I've seen the single wire in the clip going to the VTEC solenoid just pop out on Honda engines before (H and B series). Unplug it and make sure the wire end is seated properly in the clip.
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Tony S. '03 WRX ... 12.69 @ 108.0 - full interior, stock 16s, street tires
'99 2.5RS '97 Prelude (old car) ... 13.94 @ 100.3 - full interior, empty trunk, 17s, street tires.
Originally posted by dvsracergirl victor, this is natalie hehehe tiff was the girl with me with the civic si. but hehe you just had a brain fart :P i forgot you were on PO. im just so used to seeing you at the shop. how is your car doing now??? did we get everything taken care of?
if you still have the helms manual that would so great!!!!!!!!!! i was gonna give you a call tomorrow to see if you could bring it down. we fixed the problem with the car not starting, but not the ecu limpmode problem. hahaha that guy put the acgs fuse in the rear speaker slot. and thats why i wasnt getting power to my vafc or my fuel pump. that problem came LONG after the ecu one. the reason it wouldnt start was stupid, because we thought a blown fuse was causing the ecu problem, and then it just got put back in the wrong spot. cant wait for my gauges to be finished!!!!! ill make sure to post pics of it when theyre done...since they are a headache.
Hehehe... sorry.. getting old. I will ask my roommate to try and bring it in tomorrow during lunch time. However, he has a company meeting around that time too. If he cannot make it, then latest by friday. I will pass him both the helms and the ETM tonite. Hopefully, this will help you solve the mystery.
btw, I know that when I have the field SFC vtec controller, the instruction was to cut the VTM wire and leave it hanging. Not sure about the VAFC, but maybe thats where your issue is? If you need any more stuff like ECU and such, let me know. I will be coming down on Saturday to look for John to do my audio, so I can bring down almost anything. =)
vtec is kicking in...so it has nothing to do with that. its got us all spinning. it is making a louder noise than usual tho. but its deffinately kicking in.
victor: okie yeah ill be here saturday. you can just bring the ETM and the helms on saturday....no reason to make an extra trip...
Shark: we actually thought it had something to do with the ignitor or the vtec solenoid. took it all apart and everything is fine.
i know its a been months....but i finally got to the root of my problems with the gauges and limp mode.
my car was throwing no codes...the decided to throw the VSS code...
after a lot of testing of wires and connections this is what i did....
i took out the new custom gauges...and put my friends stock ones back in..the car ran perfect again...i took the stock ones out and ran with NO gauges....the car still ran perfect! i put the new ones in...soldered them and made sure that everything was connected where it should be and it went back to limp mode.
so bascially the problem is with the gauges...we tested all the wires and everything shows that it should be working properly. Next step os to dissconnect all the wires one by one untill we figure out which wire is causing the problem. STUPID OBD2! i guess the system doesnt like aftermarket gauges...it trips the ecu out....
but after all is said and done im going to try and get my hands on another set of stock gaues and just use these for my drag car! sigh!
dunno if u wanna try this, but u might wanna try to test the resistance of the circuits, if u can, and compare it with the aftermarket gauges. The stock ecu might just be sensing for some load from the gauges.
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