Limp mode

rjmcalister · Post by **rjmcalister** » Sun Nov 04, 2007 7:55 am

In the past week I've developed the following problem. Under WOT I think the car is popping into limp mode. The problem only last a second or two, the check engine light flashes on then off (code not stored), then the car recovers and runs fine. I was able to datalog the sequence and have attached. Any ideas on what's going on would be appreciated
Thanks, Bob

Post by **Spunkster** » Mon Nov 05, 2007 12:09 pm

You're hitting a boost cut.

rjmcalister · Post by **rjmcalister** » Wed Nov 07, 2007 5:51 pm

I've got a supercherged Type R and am using the stock map. Is there any harm in disabling the boost cut or would it be better to install a 3 bar map?
Thanks

Post by **Spunkster** » Thu Nov 08, 2007 10:22 am

You can disable the boost cut, but without knowing how much boost you are making it is impossible to say if you need a 3bar map sensor.

rjmcalister · Post by **rjmcalister** » Fri Nov 09, 2007 2:56 pm

The help files indicate that 10.5 psi is the max the stock map can reliably measure. When I set them above this level I get the warning about exceeding this value. I believe on a cold day I may be seeing ~11psi. Will I have any problems running this level of boost w/the stock map? Being supercharged I don't need to worry about higher levels than this.
Thanks

Post by **Spunkster** » Fri Nov 09, 2007 4:39 pm

you will probably be ok as long as you tune it properly at the max boost level and disable the boost cut.