Anemic Engine....

[Rauland-S13]

hey guys. I seem to have a bit of problem with my engine. I'm running an '89 coupe with a '92 KA24DE w/ 124XXX miles. The past couple of days my engines been anemic. seems to have a total lack ot torque. I can get up to speed, but none of the 'oomph' (as much as a KA has). It idles rough, tends to stall out when I first start it. I've made no modifications to the engine at all. I have a new rotor, cap and wires on order, as well as a new O2 sensor. Spark plugs are recent (less than 1000 miles) and clean, air filter is K&N, a little dirty, but not clogged. Fuel pump appears to be working (will double check it though). MAF was cleaned recently too. I was wondering if it could be the O2 sensor (never been cleaned or replaced in the year and half I've had the engine) or if maybe a vaccuum line disconnected somewhere or maybe fuel injectors (not sure how to test them). Any ideas on where to start trouble shooting would be greatly appreciated.

Thanks all,

Craig

Modified by Rauland-S13 at 8:17 PM 8/2/2009

Ok....so just pulled the codes from my ECU and came up with a 14, 33, 34, and 45. Did a search, and that tells me I need to replace my O2 sensor (already ordered), VSS, my Detonation Sensor and I have an injector leak.

I tried searching for some more info and am a little confused now. Not sure what the Knock sensor is supposed to do (or how important it is to replace) but the speed sensor has be boggled. All the posts I've found on here deal with one of two things: 1) Speedo is not reading right, do I have the right speed sensor and 2) are these speed sensors interchangable.

My problem is my Speedo is fine. Why would my ECU be throwing that code? (is it because my Cruise Control doesn't work?)

My other question is, how do I test for an injector leak to see which injector is leaking, or should I just replace all four?
Modified by Rauland-S13 at 8:26 PM 8/2/2009

[nissans13240sx]

First check your ecu for codes. If code 55 is there move on. Next swap your maf out with a known good one. does it misfire at all idle or driving?

[Rauland-S13]

doesnt misfire per se..... just rough idle, and sputters almost like its out of fuel, or dead/dying battery..... (just replaced the altenator and everything else in the charging system checked ok, I have a spare battery to throw in just in case). I'll check the ecu this weekend (assuming I have time from work). The other symptom I forgot to mention, is that under and sort of acceleration, there is a 'breathy whine' not unlike a diesel engin under load. Best way I can describe it.

[i240sx]

[QUOTE=just rough idle, and sputters almost like its out of fuel, [/QUOTE]

try getting a new fuel filter or check fuel pump, fuel pump might be on its way out

[Gabes13]

tps

[Rauland-S13]

so, I'm out at the car, about to pull out the ECU to check for codes, and I decide to check my intake again. Seems it had come disconnected from the throttle body. Hooked it all back up, and the car is running fine again. tomorrow I'll finish checking the ECU to see if anything else is wrong. Thanks for the suggestions and help all.

Craig

[Rauland-S13]

bump....

[FoxFire]

so, I'm out at the car, about to pull out the ECU to check for codes, and I decide to check my intake again. Seems it had come disconnected from the throttle body. Hooked it all back up, and the car is running fine again. tomorrow I'll finish checking the ECU to see if anything else is wrong. Thanks for the suggestions and help all.

Craig

thats it you fixed it.. it will probably store a load signal and maf code for a while.

I was going to say check the intake piping before i saw you fixxed it.

[Rauland-S13]

I fixed that little problem, but the ECU is throwing a code 34 (I think..... whatever code is for the VSS) among others (see my original post).... but I've searched through the forums and found nothing (except what I posted in my original post) and my Speedo is fine..... what else could be causing the ECU to throw that code?

[andrew96_240]

here's a code list for ya

Items DTC Ref. Page Camshaft Position Sensor 11Mass Air Flow Sensor 12 Coolant Temperature Sensor 13 Vehicle Speed Sensor 14 Ignition Signal Primary 21 IACV-AAC Valve 25 ECM 31 EGR System 32 Front O2 Sensor 33 Knock Sensor 34 EGR Temp Sensor 35 EGRC-BPT Valve 36 Closed Loop 37 Intake Air Temp Sensor 41 Throttle Position Sensor 43 CYL 4 Misfire 65 CYL 3 Misfire 66 CYL 2 Misfire 67 CYL 1 Misfire 68 Random Misfire 71 TW Catylist System 72 Fuel Injection System 76 Rear O2 Sensor 77 Crank Position Sensor (OBD) 82 A/T Diag Comm Line 84 Crank P/S (OBD) Cog 95 Coolant Temperature Sensor 98 Park/Neutral Position Switch 103 EGRC Solenoid/V 105 Inhibitor Switch 111 Vehicle Speed Sensor 112 A/T 1st Signal 113 A/T 2nd Signal 114 A/T 3rd Signal 115 A/T 4th Signal or TCC 116 Shift Solenoid/V A 118 Shift Solenoid/V B 121 Overrun Clutch S/V 123 TOR Conv clutch SV 124 Line Pressure S/V 125 Throttle Position Sensor A/T 126 Engine Speed Signal 127 Fluid Temp Sensor 128 A/T Comm Line XX EC-192

[Rauland-S13]

I mis-quoted the code.... I'm getting a code 34, but the one that confuses me is the code 14 for the Vehicle Speed Sensor. My question is what would cause my ECU to throw that code?? I've searched on the forums here (sifted through 4 pages of posts) and the common theme is either A) 'Is this sensor interchangable with that sensor?' or B) 'My Speedo reads 120 when I'm doin 40, is my sensor gone?'. Since I'm dealing with a factory KA24DE, I dont have the wrong VSS. And my couple of speeding tickets can attest to the fact my Speedo works just fine. So what else is there?

[Rauland-S13]

bump....

Did some more searching, still cant find anything else that would cause the ECU to throw a code 14. Got some price quotes, and I'm looking at anywhere from $120 -$180 CDN for a new Vehicle Speed Sensor (local autowreckers dont have any 240 parts, and nissan parts almost as scarce.... I'm one of three 240's in town and the only coupe )

Don't really want to spend money on a part I may not need.... Anyone out there have some ideas as to why I'm throwing a code 14? Is it because my cruise control isn't working (or maybe its why my cruise control isn't working)? Is it because I'm running a '92 engine and transmission with an '89 gauge cluster (love the HUD )?

[FoxFire]

is it code 34 or 14?

cuz the vss doesnt really affect the engine

but the knock sensor will cause problems

[Rauland-S13]

I'm getting both, as well as a code for the O2 Sensor, and injector leak. I'm just curious to know if it is neccessary to replace my VSS when my speedo is working fine, or if the code is just a by-product of swapping out my Auto KA24E for a Manual KA24DE.

[FoxFire]

the vss code doesnt affect a manual trans car.

its only for locking the auto torque converter after 12mph.

the rest of those are problems that need to be fixed. good luck

[Rauland-S13]

Sweet. Thanks, thats just the answer I was looking for. I've already sourced and/or bought the rest of the parts I need. Actually, the O2 sensor just came in today. And the Injectors shipped today, should arrive soon, and the knock sensor shipped out a couple of days ago. Should have everything in and installed within a week.

[guanaco0827]

Hey...Rauland-s13 could you give an update with your final results after installing all the new parts?

I have kind of a similar problem. My ecu is throwing trouble codes 11 and 34 (camshaft position sensor and knock sensor).

Was your ecu accurate to the problems your car had?

[Rauland-S13]

No problem. I had posted the results in another thread of mine. I replaced the O2 Sensor and knock sensor and everything seemed to clear up. No longer running anemic. But I also installed a short air intake, new dizzy, new rotor and new NGK Iridium plugs at the same time... so one, a combination, or all of the above seemed to fix it. I haven't installed my fuel injectors yet, so I'm still throwing the code for injector leak. I still have a bit of an idle issue, and I'm pretty sure that's more to do with the timing than anything else, but the car no longer hesitates, nor dies out while idling and when I step on the gas, she actually goes.