Join Date Feb 2011 Location North Idaho Age 56 Posts 10,477 Looking at data does not show any ground issue, but you do have issues! If knock signal wire th pcm is B-7 then it has esc spark control If the signal feeds to B-15 on pcm it is without ESC electronic spark control. Running 89 is a waste of money and actually can cost you a tiny bit of power because higher octanes are harder to burn (which is why they are required to Loading... http://allsoftwarereviews.com/code-43/code-43-usb-fix.php
The wire disappears into a wiring harness, then into a heat-shield tube connected to the bell housing. Forgot your Password? The needle or meter should move each time you tap. is the engine rpm reading irratic on the scan? why not try these out
Member No response. Also, the water pump is squeeling pretty bad. I should mention the car still drives normally, and the light goes out after a few seconds, but it does come on to remind me....will my car breakdown on the road?
Intake: Ultimate T.B. + spacer, 14 X 3" open element 1.6 Comp Cams Roller rockers Exhaust: 1 5/8" Edelbrock shorty headers through 3" Flowmaster, carsound 3" converter. Sign in to make your opinion count. how do i test the sensor for 2.5 if both are connected? "To check knock wires there should be 5 volts on wire key on wire disconnected from knock sensor and Obd1 Code 43 Honda I really appreciate everything!
Join Date Mar 2011 Posts 63 More grounds never hurts. Gm Code 43 Fix Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. I have done a diagnostics of the knock sensor circuit,I am fully aware of the code ,how the system works,and how to clear codes. http://www.gm-trucks.com/forums/topic/155148-infamous-code-43/ Up next Chevy Silverado Knock Sensors FIX IT RIGHT The First Time - Duration: 28:07.
This has the ESC with 1 knock sensor. Code 43 Chevy Tbi Reply With Quote 06-18-2012 #15 CapriceLT1 View Profile View Forum Posts Private Message Fuel Injected! EmailReport someotherguy Moderator Posts: 28031 Age: 46 Loc: Texas Reg: 08-01-03 User InfoSend Private TopicView Profile 01-28-10 03:01 PM - Post#1851557 In response to ltlvt He's got a '91 Knock sensors produce an AC millivolt signal when the engine is running, even at idle, whereas an oxygen sensor signal is more DC like.
hope that helps :cheers: guywade View Public Profile Send a private message to guywade Find More Posts by guywade CorvetteForum - Chevrolet Corvette Forum Discussion C4 Corvettes, 1984 - http://www.gearhead-efi.com/Fuel-Injection/showthread.php?928-Tuning-out-Knock-Sensors-to-get-rid-of-code-43-in-my-95-LT1 The ECM will retard the timing by as much as 20 degrees in 1 degree increments. Gm Code 43 Obd1 Feel there is erroneous signal to ecm.93 is differnet than 92,but cant find enough info to verify smae as 94.it seems 93 is an odd year.(strike year i presume). Gm Code 43 Esc Failure Thread Tools Search this Thread 03-27-2010, 06:54 AM #1 1988-305-tbi Senior Member Join Date: Mar 2004 Location: SoCal "Riverside" Posts: 550 code 43, ESC/ knock and jumping spark?
New battery. news Autoplay When autoplay is enabled, a suggested video will automatically play next. The light came on while I was driving and I floored it. TBI or Multi port fuel injection? Gm Trouble Code 43
Haynes manual says it should supply a 8-10 volt signal when no knock is detected. I live out in derby but I'm downtown every day for work. Getting ready for a test drive now. have a peek at these guys What is the best way to test this connection, where is the other end of the dark blue wire, is this the voltage I should be looking for, etc.???
Was this answer helpful?YesNo Tuesday, March 10th, 2009 AT 4:01 PM whheezzzz Member Its a 1993 Cevy S10 Blazer 4.3 Vortec Vin W CPI injection 4x4 I have 2 knock sensors Code 42 Obd1 Common fix is to replace O2 with a new one - use Delco unit as other MFG O2 sensors have a different response characteristics. A knock or tapping on block should change B-15 line voltage under or over 2.5 volts.
Chris Cuff 6,341 views 2:28 How To Diagnose A Fuel Pump Failure - EricTheCarGuy - Duration: 5:33. If it is not, the sensor is faulty or the sensor is not making good contact with the block. I'm in your area BTW. Gm Code 42 The ECM will retard the timing by as much as 20 degrees in 1 degree increments.
Haynes manual says it should supply a 8-10 volt signal when no knock is detected. Join Date May 2012 Location Kenmore, NY Age 25 Posts 51 It is running really bad. 02 sensors are new. I am replacing that tonight. http://allsoftwarereviews.com/code-43/code-43-fix.php The reason I am asking my 88 has the Electronic spark control external mounted on the engine and some of the later ECM's have it built into the chip inside the
UMI SFC's. That may be the knock sensor module / ESC spark controller. I was thinking a good spot would be where the negative battery cable bolts to the middle of the block, to put a cable from there to the frame. TBI.
A knock sensor (located on passenger side above oil pan rail, in the block) sends signals to an ESC module which then signals the ECM that knocking is being detected. One of the major causes of this falure is a bad rpm pickup coil, they cause the modual to burn out in a short amount of time. A loss of knock sensor signal or loss of ground at the ESC module will cause the signal at the ECM to remain high. what did you mean in the first quote?
Also spark retard is pulling spark whenever you accelerate although there are no (once) knock counts. Other OBD1 Code 43 Questions93 S10 Blazer Engine Service Code 43 And Abs Code 37 ?I Have A 93 S10 Blazer 4.3l(vinz)4x4 With 200k Miles Whose Engine Service And Abs Lights Chilton(surprise,surprise) is for what i call "monkey mechanics",it is often generic and incorrect.The only thing that book is good for is parts replacement(and then i sometimes am discouraged). I'll update after more poking around.
It shouldn't, not even with 87. Forum Forum Home New Posts FAQ Calendar Forum Actions Mark Forums Read Quick Links Today's Posts View Site Leaders Advanced Search Forum Fuel Injection TunerPro Tuning Talk Tuning out Knock Sensors So the differance must be in PCM. SPONSORED LINKS Was this answer helpful?YesNo Saturday, March 21st, 2009 AT 8:33 PM Please login or register to post a reply.