limp mode mod

A question, my bus has been running sweet since fitting dawes, but every now and then when I start my bus the check engine lights stays on, turn the key off and start it again check engine light goes off? ive got a OBD 2 but it wont communicate with the computer as I want to know what the check engine fault could be, can anyone recommend a correct OBD to buy so I can run my checks and to clear fault codes?

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Originally Posted by Rickie3

............... ive got a OBD 2 but it wont communicate with the computer as I want to know what the check engine fault could be, can anyone recommend a correct OBD to buy so I can run my checks and to clear fault codes?

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Although plug/socket looks like OBD2 it doesn't support OBD protocol, it is still Consult proprietary protocol.


ECU Talk interface cable and software works. Other alternative is Nissan Scantech but you could also use flash codes. Check ZD30 reference document on this site to see how to.

Cheers

Yep they will as I'm currently trying for a mod plate. They have just been given new regulations regarding emissions and checking everything now :-(

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Originally Posted by Rumcajs

Although plug/socket looks like OBD2 it doesn't support OBD protocol, it is still Consult proprietary protocol.


ECU Talk interface cable and software works. Other alternative is Nissan Scantech but you could also use flash codes. Check ZD30 reference document on this site to see how to.

Cheers

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Could I use this unit? http://www.ebay.com.au/itm/Newest-Tu...item27d4242adc

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Originally Posted by Rickie3

Could I use this unit? http://www.ebay.com.au/itm/Newest-Tu...item27d4242adc

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Definitely not on pre 2007 models (non common rail diesels) That unit seems like rebadged Scangauge which only operates on OBD II protocol.

Cheers

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Originally Posted by Rickie3

That is correct! EGR blocking increases the voltage to the MAF, the diode drops the voltage by 0.5 to within specs, but yes you will notice sluggishness, but me I can put up with that, far better than hitting limp mode

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How does blocking your egr increase the voltage to the maf? I m still getting limp mode at low psi when the engine is cold, would replacing the maf help? And why don't I get limp mode when when it's warmed up?

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Originally Posted by Paule

How does blocking your egr increase the voltage to the maf? I m still getting limp mode at low psi when the engine is cold, would replacing the maf help? And why don't I get limp mode when when it's warmed up?

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Mate. Mafs can do wonders when they play up. It may not be your maf but could well be a ill adjusted dawes and needle valve. Unfortunately I am in a real busy time right now, I have two weeks to finish my backyard for the wifes 40th. It's a real bog hole right now and I have f all time to do it. As discussed mate via pm, I am more than happy to re tune your car and throw a maf in to see what happens. But it's just a insanely busy time for me. Be patient mate. We'll yet there. I just wish I had the coin to open up an actual shop to complete my dreams....