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6 bolt crank and 7 bolt cam signal

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inthemidst

10+ Year Contributor
363
23
Aug 25, 2009
PALMDALE, California
I have a 6 bolt bottom end and a 7 bolt head 96 gst wondering if I can keep the original cam sensor and just use the crank signal from the 6bolt design. And would this avoid the swapping wires around and the p0300 code???
 
The 6 bolt gets the crank signal from the 6 bolt style cam sensor. The only way I am aware to use the 7 bolt cam sensor and integrate the 7 bolt style crank sensor is to use the kiggly trigger plate for the 6 bolt crank. (but I am no expert)
http://kiggly-racing.com/all/6-bolt-crank-trigger-sensor.html

Do you have ecmlink?
If not you might as well get it and just run the 6 bolt cam angle sensor to make life easier. Well thats what I would do.
 
No I want to use the original cam signal from 2ghead by the timing belt and use the 6bolt sensor for crank signal will it work perfect or still get p0300 code.i tried the add a resistor on the maf and now I get a p0105.
 
The misfire code comes from the 1g style cas giving the ecu a crank signal that is a little different than the oem 2g signal (forget the specific details) the cas for the actual cam signal doesn't really cause a problem outside of having to swap some wires around.
Im guessing you don't have link then??
I just did the 6 bolt swap and said F it and bought link.
I bought this as well for a clean look, they did it better than I would
http://www.ecmtuning.com/product_info.php?products_id=73
 
I read on here somewhere that the crank signals are the same for both but its the cam signal that is inverted and that's why we have to swap wires around and get a p0300 code
 
I added a 10 k resistor so I don't have to play with the potentiometer and it works but now I get a p0105.
 
Well just installed original cam sensor with the 6bolt crank sensor combo and it works perfect only people with 95-96 models will work.
 
I'm still getting the p0300 misfire code just wondering if maybe I'm really misfiring and it has nothing to do with the cam sensor if I am technically misfiring will it still go into the lump mode like the one you get with a 6 bolt swap????
 
The P0300 misfire code is caused by the CRANK position sensor (not the cam position sensor). The CRANK position signal from the 1G CAS is not compatible with the 2G ECU's misfire detection circuits and will show up as false misfires. The ECU will then disable the injector on the cylinder that it thinks is misfiring the most. It does this for emissions, to prevent dumping unburned fuel into the exhaust and overheating the catalytic converter.

ECMLink is, by far, the best way to disable misfire detection.

Adding a 10K pot to the barometric sensor wire will cause the ECU to think that the car is running at extremely high altitude and will be using different fuel and timing maps. Fuel will be very lean and timing will be advanced very far. Watch out for knock.

Jim
 
If you look at roadrace engineering oscilloscope diagram it shows the cam sensor is not compatible but the crank is correct me if I'm mistaken.well my real question is how can you tell the difference of a cas p0300 and an actual p0300 misfire?
 
The CAM signal from the 1G CAS is not compatible with your 96 ECU. This is why you have to swap the spark plug and injector wires around. By using the stock 2G cam sensor, you do not have to swap the spark plug and injector wires. This has nothing to do with the P0300 misfire code, however.

The 2G ECU detects misfire by looking for small changes in RPM at a steady cruising speed. The RPM signal comes from the Crank position sensor. The stock 2G crank position sensor is driven by the crankshaft and is very accurate. The 1G CAS is driven by the timing belt and is less accurate. This is probably caused by flex/whip in the timing belt. This shows up as small changes in RPM and triggers the P0300 code.

Unfortunately, there is no way for the ECU to tell the difference between real misfires and the false misfires caused by the 1G CAS. The CRANK signal from the 1G CAS WILL cause false misfires. If you are having real misfires, you should be able to feel them during the 300 second, closed loop, highway cruise that triggers misfire detection. The ECU will not look for misfires at idle or WOT.

The P0105 code is being caused by that 10K resistor in the baro sensor wire. You have too much resistance. The whole point of the 10K pot is to be able to adjust the resistance so you don't get a CEL but still disable misfire detection.

Jim
 
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