Ok so i started running e85 in my car about a month ago. I had a 12:1 comp je, eagle rod b18c block, full ported b16 head. About a week or so after i started running e85 my car would go all the way to 8k with the af's dead on! then it wouldn't pass 8k at all. It was like there was a restriction of some sort. I changed the distributer, fuel filter in engine bay, messed with fuel pressure, etc. None of the above helped... Later after i put my distributer back on i was doing another pull to see if anything changed. Well i started in second and it got to 8k and stopped, so i shifted and right when i did it went boom. And no, i didn't misshift. Broke the rod bolts on number 4. Well i got the new motor in this weekend and got it going. I did some pulls last night and it would god to 8500 and it got lean there, but it wouldn't stop revving like it did previously. Well today i was doing more pulls street tuning and now it gets lean earlier, like at 7800 and dropped to 7500, and now seems at that and possibly keeps getting lower. I can add any amount of fuel and it doesn't help a thing.

I'm running id1000's, intank walbro 255 hp, running base fp of 60 psi. I don't have a relay wired to my pump yet, but i was planning on wiring it up tomorrow. I don't think that will change it though. I think i'm going to change the filter on my fuel pump and see if it changes anything. I really need some input if anyone has gone through something like this before...

I am going to ifo @ noble, ok this weekend and need to figure this out quick!

Thanks in advance for any help.

 

sounds like a clogged injector to me. i run e85 also and 0 problems on my turbo car.

 

the injectors are brand new from t1. They have the drive from little rock, ar to kansas city ifo, like 6-10 passes there, the drive home, and approx. 300 more miles on them...

 

i had a similar problem,have them flowed only way to know.

 

it sounds like your pump is taking a ****. clamp your return line at idle and see how many psi it spikes. If it doesnt slam over 100+ psi, the pump is going bad. Hope this helps

 

fuel pump is going!!!!

 

Yea..thats what Im thinking as well. Fuel pump that is. You might need a bigger fuel pump?? Whats the setup? N/A right? How much power? I have never had any problems with my Walbro 255hp but you just never know! How old is the fuel pump? GL with finding the culprit.

 

Try lowering your base fuel pressure and add fuel in the ecu.

If that makes up for it, then its your fuel pump not being able to hold the ammount of volume at that high of psi.

 

Yeah the fuel pump is pretty much brand new! I got it along with the injectors. I had a walbro 255 hp before this one for 5 years. It got ran a little dry and got hot and stopped working. The next day i started my car and it worked, but i bought a new pump anyways just to be safe... I had it tuned perfectly all the way to 10k when i started running e85. It started messing up the week after kansas city ifo. I'm going to try and swap the injectors out today possibly. I might put my old pump back in to see if it does the same thing.

It is a all motor setup. Not sure how much power it's making cause i only street tune. It's gone 87mph 1/8th and 100mph 1000ft. I have the injector size set as 950s in the ecu even though they are 1225s @ 60psi bp. It just makes tuning on e85 easier. With the ecu thinking they are 950s, they are at like 70-80% duty cycle.

 

oh yeah. and last night when i started driving home, it was running much leaner everywhere, just normal driving. I had to add about 12 clicks of fuel for it to be back in the 14s.

thanks for the help!

 

care to elaborate on this theory a little more?

 

we are having same problem with my buddys car we changed everything already but fuel filter

 

since e85 consumes approx 1/3 more fuel, i set it like that so the ecu compensates less for the injector size. It helps alot. Air fuels start out almost dead on with what they need to be... If i left them set at 1225's i would have to start adding a ton of fuel before running it. This way you don't have to do that, it starts out so close to right.

I have seen a reputable tuner do this also.

 

The main fuel filter, or the sock filter on the pump??

 

it's either fuel pump, fuel filter or injectors, nothing else im am 1090078900% sure.

 

hah yeah, i can narrow it down to that. lol. The fuel pump, injectors, and fuel filter have appox. 1000 miles on them. The only thing that hasn't been changed is the sock filter on the pump.

I'm going to see if i can borrow my buddy's id1000s today to see if it changes anything.

 

if your running a paper element fuel filter it is clogged there not compatable with e85. you have to use a SS filter. i had this happen frist hand and ate a head gasket. the symptoms where the same as yours.

 

cool. where can i get a ss filter? You talking about the one in the engine bay? Or the sock filter too?

 

the sock is actually plastic but i used the aeromotive 30or 40 micron i cant remember what size exactly and never had a problem after

 

i found the replacement # 12635 from aeromotive i had the assm befor and just changed the element

 

So is there noone that makes a oe replacement ss filter? I guess i will have to get a aeromotive canister style filter with replacable elements? Any good way to do that with stock fuel line?

 

just talked to my friend that tunes alot of e85 cars and he said the honda filters are pretty good with e85 but if its old then he would change it for a factory honda filter.

 

Ok cool thanks. The filter on it only has about 500 miles on it. But it isn't a factory honda filter. It's an aftermarket, i think a purolator. I will try a factory one i guess.

 

I don't see how running your injectors with another injectors settings is a good thing, I can't remember exactly what the names of the variables are but they are injector specific, by running another injectors settings you could be making them run out of duty prematurely. Does your EMS not have a global fuel trim?


Oh and I had a friend run an OEM paper filter on E85 for 15k miles making 595whp all day and never had an issue with it failing/clogging, I am not saying he was smart to do it but it will work for a little while.

 

I'm running hondata s300. I had the car running perfect with it setup like this. Changing the injector size helps the ecu to know how much to compensate. I'm not worried about it since the tuner i saw do this tunes a huge amount of hondas. And he's not in arkansas if that's what you're thinking... lol

Yeah i ordered a oem filter from honda today and will have it tomorrow morning. I normally always get oem stuff, especially since i worked at honda for 3 years. When i got this filter it was another rush thing that i had to have on a saturday before going to the track, so the dealership wasn't open.