Ronny

iTrader: (1)

I am getting a MAP flag in my data log and occasionally a CE light on dash. Happens on an extended cruise at 60 MPH. Does not occur at 40 MPH or less. Car runs well on tune. It is due to my cam 236/242 @.05 on a 112 LSA? Engine is a SB roller 396 new for this season.

I believe I can turn off flag by removing the "set" in TP. Is it done to both MAP 33 and MAP 34?

Or is it best to change a setting for MAP? If so which should I move and which way. I already did but that did not help.

Thank you.

Ronny

RBob

iTrader: (1)

Need to get a data log and see what is happening. Is it code 33 or code 34? One is MAP too high, the other (34) is MAP too low.

Could also be an issue with the vacuum line between the MAP and plenum. Or even an electrical connector issue.

RBob.

Ronny

iTrader: (1)

I can do that. I did not mention but I needed to add a vacuum pump due to significant loss of vac and resulting braking was noticeably lessened to a point where it was unsafe,,It appears in logs that MAP sensor is working. Sensor is about two years old and has about 10 hours on it. Drivability is excellent.

Ronny

iTrader: (1)

I sent a data log to RBob at dynamic efi. Could not attach here.

FYI Map was seeing 10 inches per my vac gauge. That is why I added the vac pump. I found out how I need to replumb the pump with a check valve rather than link direct to vac booster for safety reasons should the pump fail to run.

Map sensor has maybe 3 hours on it vac line is secure and literally new. Logs are as expected on vac /map values and car runs great.

Ronny

iTrader: (1)

Sorry about that. I should have checked the log first. I see that was about a 15 minute ride at 30-45 mph. I don't recall that ride setting off a CE. However I did a 24 mile ride on XWay at 65 mph and 15 minutes in it went off. WU malf code was as I ssid hi map. Now looking at logs map is functional following throttle opening as expected. This weekend a new gauge cluster is going in so I will datalog again on same ride on XWay and capture event if it occurs.

I idle warm at 900 rpms and 60 map. As I said 10 inch of vac there. I added a vac pump and that gave me back decent brakes. On at 16 and off at 20. Vane pump(quiet)

RBob

iTrader: (1)

OK, IIRC, and looking at the previous log. You are running an overdrive 5 or 6-spd manual trans. It just may be that in a high gear with little throttle the MAP is increasing enough to kick off code 33.

Look at this BIN parameter and compare it to the real MAP value when code 33 hits:

MALF33 - MAP Hi BARO Limit (1bar)

If the MAP exceeds that value it will toss code 33. Which is possible with a 6-spd and a cam.

In this case just need to increase the value of that parameter to a bit above what you see in the log when the malfunction occurs.

RBob.