Slight surging while decelerating / coasting

[Ccmano]

Originally Posted by stuntmanmike

This is a California car and when I put the Haibeck chip in I didn't remove the old one, was a "piggy back" situation I believe, wonder if CA-delivered cars have extra smog equipment that could be contributing?

California cars are no different technically. Can you post a photo of the “piggy back” set up. That should not be there. I wonder if your running a Haibeck CA smog board with a chip on top. There should only be one chip in there. Either an original or the Haibeck.
H

[XfireZ51]

Hans,

I think he is describing a Haibeck prom on a Moates g2 adapter.

[Ccmano]

Originally Posted by XfireZ51

Hans,

I think he is describing a Haibeck prom on a Moates g2 adapter.

True, that’s what Haibeck used for his CA emissions chip set up. Like this one...
H

https://www.ebay.com/itm/Haibeck-Tec...BZ5hcO&vxp=mtr

[XfireZ51]

Right. I can erase the original prom and burn it w a modified cal, although that is a PITA. Spoiled I guess w Ostrich.

[Vetman]

Mine does it too. Put Marc’s chip in in 2015 and it still does it but idles slow now and runs much cooler with ac on!!!

[jss06c6]

Originally Posted by XfireZ51

Right. I can erase the original prom and burn it w a modified cal, although that is a PITA. Spoiled I guess w Ostrich.

I use this setup.. not too cumbersome... Ostrich definitely better, but need to find a decent place to locate it if you're going to make it permanent..

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[Norwegianmopar]

This is what Marc Haibeck told me regarding this subject:

"Yes it is normal. It's more noticeable on some cars than others. It is the deceleration fuel cutoff mode activating when you close the throttle to coast. When the throttle is opened the fuel is turned on causing a small surge in torque. The deceleration fuel cutoff mode can be turned off in the engine calibration chip"

[lfalzarano]

I had a similar problem (2200 - 2500 RPM’s coming to a stop) and replacing the ICAC didn’t fix it. So, I sent the throttle body to Mark for a rebuild and also get his chip. He found some “gunk” behind the throttle body plates on the manifold side. It is unknown how it got on that side, but it caused the plates to stay partially open and the high idle during deceleration and coming to a full stop.


Lou

[XfireZ51]

Originally Posted by jss06c6

I use this setup.. not too cumbersome... Ostrich definitely better, but need to find a decent place to locate it if you're going to make it permanent..

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Steve,

I locate the Ostrich up around the wiper motor. There’s a spot there where it tucks in nicely. I also put it in a ziplock bag to keep any moisture away from usb port. One other alternative is to remove the stock prom and solder in a EEPROM.
I have the SST 27F512. This allows u to flash the cal without needing to UV erase things. I use the Moates Burn2 for this. However, to use the 512 chip, you need to “stack” the bin because its looking for a 64kb block not 32kb.

[jss06c6]

Originally Posted by XfireZ51

Steve,

I locate the Ostrich up around the wiper motor. There’s a spot there where it tucks in nicely. I also put it in a ziplock bag to keep any moisture away from usb port. One other alternative is to remove the stock prom and solder in a EEPROM.
I have the SST 27F512. This allows u to flash the cal without needing to UV erase things. I use the Moates Burn2 for this. However, to use the 512 chip, you need to “stack” the bin because its looking for a 64kb block not 32kb.

Thanks Dominic. If/when I put an Ostrich in, I'd like to try to get it in the center console and wire up from there. It would be nice to have for my upcoming tuning after the ported top end is finished.. having my laptop and TunerPro in the car with me would make it nice to log data and make changes while I'm in the Dyno and on the road (stopped to make changes of course!).

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