Low blms

[rare86t]

I have a new motor combo, and my blms at idle and cruise are 90-98. Fuel press at 42. Tried new maf, .46 tps. If i step into throttle a bit blms go up 108-115. Also noticed on a hot restart motor does not start quick like loaded up. But does not miss after start like leaking inj. Any help appreciated .20 \ stock block with 2 center steel caps,je pistons,erson 220 cam ,ported irons,55injs,power plate,te-45a-q\trim,m.j.17row.

 

[Russ Merritt]

Who's chip? They need to caliberate the fuel map a little leaner.

 

[rare86t]

Red Armstrongs 93 ttt

 

[WarpSpeed]

That might be about right with RA's chip. That's what chip I run, and those BLMs are "about" the same levels I'm seeing, especially since I got a 10" convertor, however, the car runs fine, so.....

Was the chip set up for the smaller than stock convertor(mine wasn't, yet)?

 

[rare86t]

ttt

 

[OKTurbo]

I see the same thing on my 87 GN with a Red's 93 chip. My idle BLMs are closer to 108-110 at idle though.

If I watch the BLM's on the scanmaster I see them running low (rich) all the time...some cells will even hit 90. I'm running 41-42 psi FP at idle. I think this is fairly common for Red's chips...plus I have 009s which are (from what I understand) fairly tricky to tune for.

My car runs good, but it still has bothered me for a while. I also only read 4 MAF # at idle too. I've heard a low AF # will also drive down the BLM's. I'm saving up now for a Trans+/LS1 MAF/Extender chip....I have a feeling my stock MAF meter is getting a bit "tired".

If your car runs OK and you don't see any black smoke you're probably just fine. It would be a good idea to pull the plugs and see how they look. You might even try lowering the fuel pressure a bit too to see if that brings up the BLM's.

Don't get too strung out on trying to hit exactly 128 on your BLM's....especially with Red's chips.

Good Luck,
John

 

[Russ Merritt]

RIGHT!!!

Me too, I got reds 55# chip and blms at idle are 106ish. Car runs good though so I dont worry about it. I've tried lowering fuel press. and it gets better but I run out of fuel at around 90-100 MPH, pulling third gear so the hell with that! Let it run FAT! Thats what BLMS are for anyhow.