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Yoshi
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Post subject: 4000 rpms... no more... less is okay... Posted: Sun Mar 28, 2010 11:10 pm |
Imitation Crab Meat |
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Joined: Wed Jun 25, 2008 3:18 pm Posts: 585 Location: Cookeville, TN
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Okay since you all helped me figure out my rack was bad I'm tempting my luck at another car question... Any how, so my car won't rev past 4000 rpm and spits and sputters and has no power.
Things that are new or good
Head Valves valve springs Valve seals valve springs Retainers Cams Timing at cams timing at distributor Distributor Cap Rotor Plugs Wires Coil Injectors Fuel rail Fuel pressure regulator Fuel filter Timing chain Timing chain tensioner O2 sensor Maf Knock sensor Water pump Thermostat
I'll be changing out the eccs relay (called egi relay on 240s) and ecu on tuesday.
Any help would be greatly appreciated I am stumped.
_________________ -bump steer makes driving more exciting- (>_<) ヨシ ドリ
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P.Haire
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Post subject: Re: 4000 rpms... no more... less is okay... Posted: Sun Mar 28, 2010 11:19 pm |
Trunk Junk |
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Joined: Mon Sep 27, 2004 8:13 pm Posts: 14385 Location: ZOO
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sounds like your car is in limp mode or you have a nasty vaccum leak.
_________________
please believe
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Yoshi
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Post subject: Re: 4000 rpms... no more... less is okay... Posted: Sun Mar 28, 2010 11:23 pm |
Imitation Crab Meat |
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Joined: Wed Jun 25, 2008 3:18 pm Posts: 585 Location: Cookeville, TN
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I think it is a limp mode thing. I'll check all the hoses and and the manifold for a leak when I work on it Tuesday. I'm in class most of the day tomorrow.
Thanks man.
_________________ -bump steer makes driving more exciting- (>_<) ヨシ ドリ
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P.Haire
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Post subject: Re: 4000 rpms... no more... less is okay... Posted: Sun Mar 28, 2010 11:31 pm |
Trunk Junk |
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Joined: Mon Sep 27, 2004 8:13 pm Posts: 14385 Location: ZOO
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go unplug your battery tonight and leave it overnight.
_________________
please believe
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Yoshi
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Post subject: Re: 4000 rpms... no more... less is okay... Posted: Sun Mar 28, 2010 11:38 pm |
Imitation Crab Meat |
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Joined: Wed Jun 25, 2008 3:18 pm Posts: 585 Location: Cookeville, TN
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I'll unplug it in the morning on my way to class and leave it till I work on it Tuesday.
_________________ -bump steer makes driving more exciting- (>_<) ヨシ ドリ
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matts13
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Post subject: Re: 4000 rpms... no more... less is okay... Posted: Sun Mar 28, 2010 11:47 pm |
OK Finally Past the Hazing |
Joined: Mon Jan 09, 2006 8:31 pm Posts: 1925 Location: Woodstick
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year of car, engine and engine management.
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Yoshi
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Post subject: Re: 4000 rpms... no more... less is okay... Posted: Sun Mar 28, 2010 11:55 pm |
Imitation Crab Meat |
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Joined: Wed Jun 25, 2008 3:18 pm Posts: 585 Location: Cookeville, TN
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good point sir... brain fart when I posted
1991 nissan 240sx stock ka w/ head studs 248/248 "hot cam swap" stock ecu.
_________________ -bump steer makes driving more exciting- (>_<) ヨシ ドリ
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matts13
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Post subject: Re: 4000 rpms... no more... less is okay... Posted: Mon Mar 29, 2010 11:08 am |
OK Finally Past the Hazing |
Joined: Mon Jan 09, 2006 8:31 pm Posts: 1925 Location: Woodstick
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i would look at your tps o2 sensor and knock sensor. and since it s nissan clean your maf to be sure. after you check those sensors it would not be a bad thing to check your fuel psi under load. a fuel up and run a car at low demand but when it is put under a load it fails.
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Yoshi
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Post subject: Re: 4000 rpms... no more... less is okay... Posted: Mon Mar 29, 2010 12:20 pm |
Imitation Crab Meat |
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Joined: Wed Jun 25, 2008 3:18 pm Posts: 585 Location: Cookeville, TN
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The o2 and knock sensor I had on there were a few months old, I changed them anyway and had the same issues. I also tried two MAFs from working cars. I'm gonna look up how to check the tps.
It's possible the fuel pump is going out, I'll have to try another one.
_________________ -bump steer makes driving more exciting- (>_<) ヨシ ドリ
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foilman
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Post subject: Re: 4000 rpms... no more... less is okay... Posted: Wed Mar 31, 2010 2:29 pm |
Not Really Past the Hazing |
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Joined: Thu Feb 09, 2006 11:52 pm Posts: 1459
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Limp mode is almost always the MAF sensor (or its wiring). DO NOT drive the car long or hard like that and change the oil ASAP. It's dumping so much fuel that it will thin the oil very quickly. 2nd, would be the knock, which is almost impossible to get to, just disconect it to test. Actually, pull the codes, it will tell you what it is.
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Yoshi
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Post subject: Re: 4000 rpms... no more... less is okay... Posted: Wed Mar 31, 2010 2:44 pm |
Imitation Crab Meat |
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Joined: Wed Jun 25, 2008 3:18 pm Posts: 585 Location: Cookeville, TN
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So I pulled codes and got the knock sensor code and turns out that the wiring had come out of the plug. We fixed it and only pull 55 which is all sensors good. How ever the car spits and sputters still. I am leaning towards vacuum leak. I'm going to take a propane tank and see if I can't find the leak. If that isn't it I guess I'm changing my fuel pump.
_________________ -bump steer makes driving more exciting- (>_<) ヨシ ドリ
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Yoshi
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Post subject: Re: 4000 rpms... no more... less is okay... Posted: Fri Apr 02, 2010 1:15 pm |
Imitation Crab Meat |
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Joined: Wed Jun 25, 2008 3:18 pm Posts: 585 Location: Cookeville, TN
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So I took a propane tank to my whole intake and everything and did not find a leak. My next step is trying a different fuel pump. I have been hesitant to do anything with the fuel system due to being mildly allergic to gas... Oh well just gonna have to deal with it. I think I will capitalize on this opportunity to order a walbro 255.
_________________ -bump steer makes driving more exciting- (>_<) ヨシ ドリ
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ChadMK4
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Post subject: Re: 4000 rpms... no more... less is okay... Posted: Fri Apr 02, 2010 1:17 pm |
Purple Drank |
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Joined: Fri Jul 16, 2004 11:23 am Posts: 2385 Location: Stocking Wood
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yea, just get the Walbro and be done with it. Good investment.
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Yoshi
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Post subject: Re: 4000 rpms... no more... less is okay... Posted: Fri Apr 02, 2010 4:51 pm |
Imitation Crab Meat |
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Joined: Wed Jun 25, 2008 3:18 pm Posts: 585 Location: Cookeville, TN
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Yeah, Ken at Enjuku hooked me up with the ISIS 255 pump for a good price so that should be on it's way shortly.
_________________ -bump steer makes driving more exciting- (>_<) ヨシ ドリ
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jsquared
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Post subject: Re: 4000 rpms... no more... less is okay... Posted: Fri Apr 02, 2010 5:26 pm |
Taco Bar Extraordinaire |
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Joined: Thu May 28, 2009 5:48 pm Posts: 4302
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If you havent already since fixing the knock sensor, reset the ECU overnight again. Ive had the ECU show code 55 but still pull timing like a mofo until I reset it.
_________________ siccccckkkkkkkk
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