G20 Van with RV Cam no power on acceleration, where to start?

**trlrider** · 11-28-2021

base timing set correct? should be zero
possible bad ignition module!

**Raymo86** · 11-28-2021

Thanks for the response tririder!!

I have redone the base timing quite a few times, set it at zero, 10 advanced, and currently have it at 5 degrees advanced where it seemed to run the best. Ignition module replaced, still bogs/spits at that 1500 rpm range

**PlayingWithTBI** · 11-28-2021

Just a thought, with only 12 PSI fuel pressure (and that cam) maybe you're starving it? See if you can get it up higher, maybe 15 plus or, adjust your VE and/or AE tables higher?

**In-Tech** · 11-28-2021

The most common thing I have seen over the years is the EGR is still active in the bin file and there is no actual EGR.

**Raymo86** · 11-30-2021

Thanks Carl, I set the temp high enough that the EGR should not turn on, but I will double check it.

**Raymo86** · 11-30-2021

Thanks, I appreciate the information.

I have been adjusting the VE, but I did not adjust the AE tables (or turn them off), which could be part of my issues. I have been using this tutorial from EagleMark (excellent stuff!!)when I run the BLM calculator, and update, I think the PE is adding fuel, which is leaning out my BLM data, as the numbers are getting leaner after using the calculator. http://www.gearhead-efi.com/Fuel-Inj...data-Tutorial!

Can a stock pump get more that 13 PSI? Do you recommend updating the pump and the Spring? I will play some more with the VE tables tonight, but am not against upgrading the pump and spring, as they are both orginal as far as I can tell.

**PlayingWithTBI** · 11-30-2021

Originally Posted by Raymo86

Can a stock pump get more that 13 PSI? Do you recommend updating the pump and the Spring? I will play some more with the VE tables tonight, but am not against upgrading the pump and spring, as they are both orginal as far as I can tell.

An ACDelco EP381 from a 96 Vortec works well. I have an 18 LB spring that I can run between 15 - 20 LBS. I ordered it with my bored 46mm TB but, I'm sure you can find one on FleaBay or Amazon

https://www.ebay.com/itm/26451283730...wAAOSw2xRYWVJj

**WASyL** · 11-30-2021

did you set timing with bypass connected or disconnected ?

**joegreen** · 11-30-2021

I didn’t view your log but Make sure your bpw is appropriate for the engine size and injectors used. I’m no expert but as i understand it you need to get the bpw in the ballpark first then start messing with ve and spark.

**Raymo86** · 12-04-2021

Originally Posted by WASyL

did you set timing with bypass connected or disconnected ?

yes, current set at 5 degrees advance.

**Raymo86** · 12-04-2021

I Changed the AE so it would not come on and it runs better, still lacks power but better. I have not ordered a new Pump or spring yet. I want to do some more data logging to see if it gets better.