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Old 1-10-13, 8:44   #46 (permalink)
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Join Date: Feb 2007
Location: Portsmouth, OH, USA
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A failing crank sensor can cause issues similar to what your experiencing, but the car dying can also cause crank sensor codes. The easiest way to test the crank sensor is the tap test. With the car running tap on the sensor with something. If the car dies or shutters you probably need a new ckp sensor.

.l..o_0..l.
93 MX6 LS KLZE w/ Interprep valve srpings and DE retainers, SS headers, Cat delete, Pacesetter catback exhaust, 11lb Flywheel, and Vogtland sport springs around KYB GR2 Struts.

Car set for over a year and someone stole the CAI, nice of them. Just replaced very noisy friction gear springs http://www.youtube.com/watch?v=OWeBUmLmAOM . Next project is to program a micro controller to convert GM MAF signal to a 0-7v signal that mimics our VAFs.
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Old 1-11-13, 22:09   #47 (permalink)

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So I solved the problem. I wish I onew exactly which thing I did to aolve the ultimate problem but the last two things I did solved the problem completely.

Last night in a last ditch effort after I relocated the hei module and made sure it was grounded really well. I told myself if resetting the ecu and letting it recalibrate doesnt work im putting in the stock cam....

Ultimately I think my problem was the hei but the reason it wouldn't hold an idle was the exhaust cam swap which was timed right but ultimately the computer was using the old fuel and ignition maps for a cam the had minimal if any valve overlap and opened 4 sooner and so on...

Long story short I have an awesome running car after I advanced the distributor and let the idle and ecu recalibrate..

Now I just need to pull a new cel that comes on over 4k and at full pull but turns of the second I shift or let off the throttle.

Thanks for playing and all the help guys

I am starting to get a laundry list of stuff done to my car. Does that make it fast? No! Does that mean i spent too much money on a toy? Maybe. Do i have fun every time i jump in my car and drive? Hell yes.
http://www.mx6.com/forums/garage/1005
http://www.mx6.com/forums/2g-mx6-gen...ld-thread.html
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Old 1-11-13, 22:23   #48 (permalink)
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What exhaust cam did you go with? And is it a de or ze? Would love to know how much difference it makes

Sent from my GT-I9305 using AutoGuide App

2g 626 GE w/ KLZE
Ferramic clutch, BC coilovers, 18" rims
nolethane front end and engine mount bushings
HID conversion
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Old 1-11-13, 22:30   #49 (permalink)

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Its the stock fsde exhaust cam. It runs great on the intake side. I think for brevity im gonna make a right up with videos and pictures for future people who want to do this.

I wont have any tangible numbers like hp and torque but I can say it will now break loose on dry pavement in first gear at 15mph when I mash it and there is significantly better low end torque. I maybe able to get on a dyno before I swap another set of cams in... I may come up on a set of dirt cheap mazdaspeed protege cams. Like $30 for intake and exhaust!

I am starting to get a laundry list of stuff done to my car. Does that make it fast? No! Does that mean i spent too much money on a toy? Maybe. Do i have fun every time i jump in my car and drive? Hell yes.
http://www.mx6.com/forums/garage/1005
http://www.mx6.com/forums/2g-mx6-gen...ld-thread.html
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Old 1-12-13, 11:53   #50 (permalink)

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pulled my cel... CODE 3! so now i have an intermittent 'g' crankshaft position sensor.

well I wonder how long I can drive it if it only occurs under full load. I'm gonna re check my wiring for the hei mod and the distributor plugs. may even tear into it and make sure everything is snug and together. I guess after owning and driving this thing like i stole it for the most part it was only a matter of time before I became familiar with the age old distributor problems inherent on this platform.

I am starting to get a laundry list of stuff done to my car. Does that make it fast? No! Does that mean i spent too much money on a toy? Maybe. Do i have fun every time i jump in my car and drive? Hell yes.
http://www.mx6.com/forums/garage/1005
http://www.mx6.com/forums/2g-mx6-gen...ld-thread.html
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Old 1-14-13, 7:05   #51 (permalink)
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If you can do the tap test on the crank, I have found a lot of bad ckp sensors that way.

.l..o_0..l.
93 MX6 LS KLZE w/ Interprep valve srpings and DE retainers, SS headers, Cat delete, Pacesetter catback exhaust, 11lb Flywheel, and Vogtland sport springs around KYB GR2 Struts.

Car set for over a year and someone stole the CAI, nice of them. Just replaced very noisy friction gear springs http://www.youtube.com/watch?v=OWeBUmLmAOM . Next project is to program a micro controller to convert GM MAF signal to a 0-7v signal that mimics our VAFs.
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Old 1-24-13, 18:05   #52 (permalink)

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Re: Help me trouble shoot my problem

Im starting to experience a problem again... I would describe it as a pop pop I think its a miss. Its not a dudt dudt... if that makes any sense... im gonna try and do the tap test this weekend.

My mechanic friend said there should be a way to align the crank and cam sensors and if their not aligned this could be my problem. Im gonna see if he can check my timing when I drop his valve spring compressor off on sunday. Does any of this sound right? He restores classics so it could be wrong but I trust him since hes done this stuff for 40 years.

I did advance the distributor all the way to the bump stop or the end of the slot rather to keep the car running after the cam swap.... Im also gonna check to see if I can find the idle adjustment screw and then put the distributor back to its normal place.

To do the tap test I just tap the crank shaft position sensor at idle with a hammer or something... gently... and it shoild stutter a bit right?

I am starting to get a laundry list of stuff done to my car. Does that make it fast? No! Does that mean i spent too much money on a toy? Maybe. Do i have fun every time i jump in my car and drive? Hell yes.
http://www.mx6.com/forums/garage/1005
http://www.mx6.com/forums/2g-mx6-gen...ld-thread.html
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Old 1-24-13, 21:31   #53 (permalink)
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Correct, I've used long pry bars and hammers. Basically anything that will create a shock to the sensor(not electrical shock). If it stutters, misses, or stalls you more than likely have a failing ckp sensor. Also, I'm not really sure what he means by aligning the sensors. If the mechanical timing is set properly and the distributor is set properly your mechanical and ignition timing will be correct. The ckp sensor is completely stationary and the cam sensor is either built into your distributor or again stationary(not completely sure on the 4cyl).

.l..o_0..l.
93 MX6 LS KLZE w/ Interprep valve srpings and DE retainers, SS headers, Cat delete, Pacesetter catback exhaust, 11lb Flywheel, and Vogtland sport springs around KYB GR2 Struts.

Car set for over a year and someone stole the CAI, nice of them. Just replaced very noisy friction gear springs http://www.youtube.com/watch?v=OWeBUmLmAOM . Next project is to program a micro controller to convert GM MAF signal to a 0-7v signal that mimics our VAFs.
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Old 1-30-13, 13:38   #54 (permalink)

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Re: Help me trouble shoot my problem

Went to do the shock test today... I heard a sucking sound... instantly knew I had a vac leak.... one of the two lines coming off of the throttle body and then to the metal vac lines ended up having a huge crack in it. About half the pipe, by passed and viola! My idle only fluctuates about 100/150 rpm now instead of jumping from 750 to 1.5k or 2k and holding.

I also reset my ecu and adjusted the idle set screw and retarded the distributor about and 1/8 to 1/4" ... running pretty good and so far no g sensor error or cpk errors. I also tapped all the wiring I did for the hei mod. I had secure connections but i wanted to get rid of the colored wires.

Aside from being a little low on oil due for an oil change and a lifter tick. Im content right now. Ill keep you guys updated. It appears maybe by taping everything and checking connections that solved the g sensor error or its actually in time now.

I am starting to get a laundry list of stuff done to my car. Does that make it fast? No! Does that mean i spent too much money on a toy? Maybe. Do i have fun every time i jump in my car and drive? Hell yes.
http://www.mx6.com/forums/garage/1005
http://www.mx6.com/forums/2g-mx6-gen...ld-thread.html
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Old 1-30-13, 20:22   #55 (permalink)
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Glad you found the issue. Keep us updated if anything else arises.

.l..o_0..l.
93 MX6 LS KLZE w/ Interprep valve srpings and DE retainers, SS headers, Cat delete, Pacesetter catback exhaust, 11lb Flywheel, and Vogtland sport springs around KYB GR2 Struts.

Car set for over a year and someone stole the CAI, nice of them. Just replaced very noisy friction gear springs http://www.youtube.com/watch?v=OWeBUmLmAOM . Next project is to program a micro controller to convert GM MAF signal to a 0-7v signal that mimics our VAFs.
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Old 1-30-13, 21:03   #56 (permalink)

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Re: Help me trouble shoot my problem

Im still experiencing a bit of a miss. Lol. Its wired when I reset the computer for the first two trips maybe 5 miles each nothing.... then it will start missing periodically and when I gas it theres a stutter. No cel though. Not complaining about no cel just....

The idle is better though. So one small victory and the g sensor code is gone and hasnt come back on.

Im gonna have to get a light and check timing. Gonna replace the coolant temp sensor as my gauge bounces. And look into the used ditsy after I find that cpk and give it a healty shock test! Lol

I am starting to get a laundry list of stuff done to my car. Does that make it fast? No! Does that mean i spent too much money on a toy? Maybe. Do i have fun every time i jump in my car and drive? Hell yes.
http://www.mx6.com/forums/garage/1005
http://www.mx6.com/forums/2g-mx6-gen...ld-thread.html
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Old 1-31-13, 1:56   #57 (permalink)
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Re: Help me trouble shoot my problem

A miss under load cab indicate weak spark. This can be too large a gap or otherwise worn plugs, bad leads, bad coil to disty connection (assuming you used an external coil, if not, you really should), weak/wrong coil output voltage. I had a miss like what you've described when i used a bosch ext coil and bosch plugs. Changed to a performance coil and ngk plugs, no more miss

Sent from my GT-I9305 using AutoGuide App

2g 626 GE w/ KLZE
Ferramic clutch, BC coilovers, 18" rims
nolethane front end and engine mount bushings
HID conversion
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Old 1-31-13, 11:33   #58 (permalink)

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Re: Help me trouble shoot my problem

I just noticed the only time its acting up is when the idle stick around 1.5 to 2k.... iac? Or maf?

How I figured this out id when it acted up I kept downshifting at a consrant speed and noticed this.
So when i was driving and it wanted to miss or try and shudder, i pushed in the clutch and sure enough idle was high.

Im gonna make sure the return vacuum line isnt cracked where the other one was. But I think its being narrowed down.

I am running an external hei. Connections are good. I may need to look up bypassing the internal coil after checking for vac leaks.

I am starting to get a laundry list of stuff done to my car. Does that make it fast? No! Does that mean i spent too much money on a toy? Maybe. Do i have fun every time i jump in my car and drive? Hell yes.
http://www.mx6.com/forums/garage/1005
http://www.mx6.com/forums/2g-mx6-gen...ld-thread.html
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Old 1-31-13, 19:26   #59 (permalink)
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Re: Help me trouble shoot my problem

Hmm. I still think its likely your coil. Maf would cause a bad mix but not a misfire as such, iac would cause a high/low idle but wouldn't effect anything once the throttle is controlling the engine. Vacuum leak is a good place to look, did you use heavy gauge wire for the mod? Especially on ground and module-to-coil connections yoy should use no less than 14ga. If you want to be sure of vacuum, pull the IM off, replace every vacuum line with silicon lines. They are much more flexible and don't crack from heat. But mainly, i would say, having cone this far wotg the HEI mod, it's only 2 wires a mounting bracket and a good non-resistor coil. Such as an MSD blaster or something. Just don't use a piss-ant Bosch SU12. This would take you 10 minutes and you'd have a more reliable and powerful ignition system. This can do wonders for things like misfires

Sent from my GT-I9305 using AutoGuide App

2g 626 GE w/ KLZE
Ferramic clutch, BC coilovers, 18" rims
nolethane front end and engine mount bushings
HID conversion
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Old 1-31-13, 20:58   #60 (permalink)

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Re: Help me trouble shoot my problem

My search capabilities eludes me at the moment but it should just be just splicing the coil send wire from the harness and then send the return back to the ditsy.... is this the thing i need to alter my ditsy cap to accept?... I mean like attach the plug cap to the center of the cap.


i used 18/16 gauge for the ignition control module. Straight copper wire though. It is the same if not better quality wire than the stock harness.

I am starting to get a laundry list of stuff done to my car. Does that make it fast? No! Does that mean i spent too much money on a toy? Maybe. Do i have fun every time i jump in my car and drive? Hell yes.
http://www.mx6.com/forums/garage/1005
http://www.mx6.com/forums/2g-mx6-gen...ld-thread.html
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