reading codes po340 and po300

1998 SUZUKI SIDEKICK
15,300 MILES
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ZUKY
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98 sidekick automatic 4x4 idle surges up and down when cold and levels off to a stall out after warm and runs rough and can not drive or it wont go fast enough.I replaced o2 sensors as it needed them for a good while ,than the maf and after that a few days it started rough idle ,my cat was not even a year old.now I hear a rattle sound in it like something is bounceing around in it.when I rev the motor it revs good just wont idle right and in drive has no pick up just boggs. thanks for any help you can spare. mj
Aug 27, 2012 at 11:17 PM
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ZUKY
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1.6 16v motor
Aug 27, 2012 at 11:29 PM
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SATURNTECH9
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Do you have a multi meter to do some testing? Also does your scan tool read live engine?data?
Aug 28, 2012 at 12:08 AM
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ZUKY
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Yes i have a muilti meter and my code reader does live engine and data ,But im not sure about how to operate the live engine and data
Aug 29, 2012 at 4:37 PM
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SATURNTECH9
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Heres the trouble tree for code P0340.WHat make and model scan tool do you have?
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Aug 31, 2012 at 1:34 AM
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ZUKY
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I have a cen-tech 98614 modle,obd2,,,also where is the cmp located? I cannot find it? nobody at the local suzuki dealer knew either. suzuki forum member said it was built in the distributor ? that is what you are refering to as pcm?
Aug 31, 2012 at 3:10 AM
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SATURNTECH9
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Iam not familar with that scan tool but iam sure in the instructions it will tell you how.Cam sensor is in the distrubutor that's why tell you to.remove the distrbutor cap.Also you remove the pcm but don't unplug it.
Aug 31, 2012 at 3:47 AM
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ZUKY
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okay so after I remove pcm with plug still on iy which way do I turn it while running test? clock wise or counter clockwise?
Aug 31, 2012 at 5:58 AM
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ZUKY
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also how do I know which trans I have ? it is auto but 3 or 4 speed I do not know how to tell.
Aug 31, 2012 at 6:01 AM
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SATURNTECH9
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The only reason your removing the pcm is to.be able to.get the wires to it so which ever way is easiest for you to be able to get to the wires.What does it say on your shifter indicator gear position wise?
Aug 31, 2012 at 6:09 AM
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ZUKY
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positions for drive,are D-2-L
Aug 31, 2012 at 6:54 AM
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SATURNTECH9
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Looks like a 3 speed transmission
Aug 31, 2012 at 8:49 AM
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ZUKY
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Thank you,Now on the trouble tree you sent it says the harness plug I assume the plug on pcm? it says the it has 26 pin, my bplug on pcm is only 7,,am I at the right plug?there is no other plug on pcm.
Aug 31, 2012 at 4:57 PM
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ZUKY
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Also maybe a pic of the test plug Im supposed to be running these test from?
Aug 31, 2012 at 4:59 PM
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SATURNTECH9
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Sounds like you found something other then the pcm i posted a diagram of where it is its number 22 in the diagram.I dont have a access to the connector faces and pin outs on the vechile.You would just find the connector thats 26 pin and the other one which they say is 22 pin and count from the end the amount of pin numbers they say which is 3.The wire should be white if you started from the correct end.Let me know what you find.
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Aug 31, 2012 at 5:21 PM
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ZUKY
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well some how were not on same page here,,,,the trouble tree said nothing about being under the dash for anything,It only said to remove pcm and turn it to test it once the testing plug is found,which in fact led me to believe it was in general area under hood,is that last diagram wireing under hood? if so its not very clear ,I cannot even blow it up like I could the trouble tree.
Aug 31, 2012 at 5:43 PM
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ZUKY
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this is what I have been reading
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Aug 31, 2012 at 5:47 PM
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SATURNTECH9
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The pcm is under the left side of the dash according to my info.It may seem like it to you its under the hood from the trouble it is not under there.
Aug 31, 2012 at 8:01 PM
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ZUKY
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Here is what I found; 2.51 v constant ,never drops to 0 with rotation. no short to grn on this white wire.
Sep 1, 2012 at 8:02 PM
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SATURNTECH9
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Are you talking about the step 2?If so if the voltage is constant you go step 4 which says check for a open in the wire which ever color yours is of no open replace cam sensor.
Sep 1, 2012 at 9:02 PM
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ZUKY
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can the cam sensor be replaced by its self? or do i have to replace whole distributor?
Sep 1, 2012 at 9:12 PM
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SATURNTECH9
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I don't see it sold seperate so looks like its the distrubutor unless the dealer has one they sell by itself.
Sep 1, 2012 at 11:57 PM
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ZUKY
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thank you for all your help,and it was a pleasure ,and I learned a few things I did not know before talking with you,If there is a rateing I can give you some where on line let me know and I will give it the best.
Sep 2, 2012 at 12:26 AM
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SATURNTECH9
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We had a rating before we launched this newer verison of this site we will be getting it but dont have it yet.Your welcome for all the help thats what were here for.
Sep 3, 2012 at 3:45 PM
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ZUKY
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Okay I got a used dist. and installed it and it cranked the first turn of key,I reset the pcm and now Im getting a crankshaft sensor code,Motor has power and I am going to put timeing lite on it ,but right now the Idle is still going up and down between 10 and 1500 k but moter is running fine. Is there a way to test crankshaft sensor?
Sep 11, 2012 at 5:36 PM
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SATURNTECH9
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What is the exact code number you have not code description.
Sep 11, 2012 at 8:52 PM
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ZUKY
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After i emailed you I took it for a ride and it bogged every now and again but always came back as I gave it gas,Than I took another reading and Po 335 and po505 came up also.
Sep 11, 2012 at 9:18 PM
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SATURNTECH9
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Lets start with the code P0335 and go from there i posted the trouble tree for you.Let me know whatyou find.
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Sep 11, 2012 at 9:37 PM
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SATURNTECH9
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Sorry that was the wrong info that was for a 1996 here is the correct info.
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Sep 11, 2012 at 9:51 PM
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ZUKY
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okay I check resistance on org/blu and white/blue on plug from pmc
I did not get any reading on meter at all,,,I did reading on ckp and it read 445
Sep 12, 2012 at 5:14 PM
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SATURNTECH9
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Alright then you have a open in one of those wires.
Sep 12, 2012 at 6:57 PM
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ZUKY
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Thanks,,,Think maybe the plug that connects to sensor? it was kinda oiled from pan,or just untape the sheild around it and start looking for bad spot?
Sep 12, 2012 at 7:17 PM
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SATURNTECH9
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The wires end to end from the sensor to the pcm and see which wire it is.Use low scale resistance setting on your meter.
Sep 12, 2012 at 10:48 PM
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ZUKY
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okay I found both wires at sensor plug were bare in same spot next to each other ,I made new plug retested and everything is normal for ckp,the code lite went out for ckp and I took it for ride and reset cmp waited to see if ceck eng.lite to come on and it did,its now reading the po505 code,idle is surging from 1200rpm to 2oo2 after warm up.
Sep 14, 2012 at 12:59 AM
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SATURNTECH9
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I posted the trouble tree for code P0505 let me know what you find.
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Sep 14, 2012 at 5:09 AM
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ZUKY
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I do not know where the IAC is.got any pics? and where the ajusting screw is or FIA fast idle air valve.
Sep 14, 2012 at 7:17 AM
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SATURNTECH9
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Iam sure you dont have a scan tool to see iac duty so i would leave that sure around.I posted a pic of the idle air control valve so i would start by removing it and cleaning it.Also clean the ports etc.
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Sep 14, 2012 at 9:31 PM
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ZUKY
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Thank you, Now I need to know where the idle air ajusting screw is because the trouble tree is wanting me to remove that screw and clean the port it screws into.
Sep 15, 2012 at 3:47 PM
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SATURNTECH9
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So far I haven't found a diagram showing where that screw it is.
Sep 15, 2012 at 5:49 PM
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KHLOW2008
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For this model there are no idle adjust screw as the idle speed is PCM controlled.
Sep 15, 2012 at 6:04 PM
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ZUKY
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okay I just did a resistance on valve and it is 11 being in spec,I read voltage with key on ,,,on the plug and it is only getting 10- 11 volts. I cleaned the valve and run a fused wire from battery to test valve and it opened and I could blow freely through it, does this mean Im not getting proper volts from pcm?
Sep 15, 2012 at 6:11 PM