Unforgiven Project

Unforgiven said:
Another possibility is the O2 sensor might be going bad. I am running two separate O2 sensors. One sensor is working with the Sniper unit... while the other O2 sensor (located on the passenger collector) is a stand alone with an AEM gauge.

I had noticed that the AEM O2 sensor was fluctuating wildly and then read dead lean.
Click to expand...
I also have an AEM AFR gauge with the exact same problem. I installed a new Bosch 4.9 LSU O2 sensor and still had the exact same problem. If I unplug the O2, the gauge reads 14.7. I did some research on the AEM website/forum and found lots of people with this problem. AEM tech always said call them. When I get home on Wednesday I plan to call them.
 
I made some headway on the motor last night.
I pulled the fuel filters apart and did an inspection and cleaned them. I finally found a use for my can of Coleman lantern fluid! It worked well
for a cleaning solvent.
The filters were not as bad as I suspected. Sure they had some sand and a blade of grass in the 100 micron pre filter...but given the enviroment that the fuel cell is exposed to, I felt they were actually fairly clean.
There were signs of that foam insert breaking down also...but Not so much that I should be concerned.
The filters are doing their job.
Here are a few pics of them apart and what I found.

First pics are of the POST 6 micron filter up front:
IMG_1100.JPG IMG_1101.JPG IMG_1104.JPG IMG_1105.JPG IMG_1107.JPG

The next few pics are of the rear 100 micron PRE filter :
IMG_1116.JPG IMG_1110.JPG IMG_1111.JPG IMG_1118.JPG

In that last pic I highlighted the fuel cell foam particles.

So after reinstalling the cleaned filters I thought I would start with a fresh tune for the motor..instead of sorting out the mess we had with Saturdays
tune.
I used the dyno tune for a base, and altered it from there.. I seen where the tuner had the base fuel set at 115% when engine reached 160* and up..
This explains the extra 15% of fuel spitting out the collector I was seeing.

Once I felt OK with the tune , I uploaded it to the ECU and fired up the engine... I'll be damned if that thing instantly started and purred like a kitten.
No stumbling or high reving....just a smooth idle.
After it got up to temp , I turned on the learn and logging...I slowly took it up to around 3500 rpm's and back down, then stopped the logging.
I shut off engine and began to look at the graphs and charts...

Now I am still learning about tuning ,so I watched a few videos on the sniper tuning and have a long way to go , but form what I have learned so far ...
all is looking good as far as the base goes..
I will have to recheck timing and (IAC) and the (TPS) positioning tonight to make sure they are correct.
This is something I have learned may have been a problem with Saturdays tune..
Like I said ...I am slowly learning.
Thats my update for the day guys!
 
Rick....My AEM gauge was working very well last night also.
I am not sure what the hell was going on Saturday ...
 
Smoked another Small block!!!!!

I'm getting good at this !!

Did a fantastic test hit with the truck and got good data..

After running all day , the little engine that could .... had to make a spectacular exit!

A big fireball out the exhaust collectors along with valve parts....

After studying the data more the next day, I seen the 350 sbc was only making 7.4 lbs boost,
at 5900 rpms, and 554lbs/hr fuel flow. on e85.

I was only hoping it would only make about 3 - 4 lbs because I installed the lower boost pullies on the back up motor.

Problem this time I think.......was the timing only pulled back to 31.4* from 34*

Should have programmed in more timing reduction to boost..

It was very hot and muggy down in the swap/bog area.. over 90 degrees out.
The highest MAT that was recorded was 101*.. That is a testament to how the E-85 has a
cooling effect on the intake air..

I will put together another back up motor to do more testing with that Holley Sniper system.
It is better to learn about this boost and EFI on old junk motors ....before I rebuild the expensive one.
 
Unforgiven said:
Rick....My AEM gauge was working very well last night also.
I am not sure what the hell was going on Saturday ...
Click to expand...

I called AEM Tech Support and it turns out I installed my O2 sensor too close to the exit, so oxygen
is diluting the gases at idle. The sensor is about 7 inches from the exit.

FP14_O2_Sensor_02259.jpg
.
 
Either one or both, although I would rather not have another bung welded to the megaphone. The turnout
could be extended another 4-6 inches before it hits the rear radius rod.

I'm not sure what a reverse megaphone would do.
 
I think I remember it was suppose to be a minimum 18" from the end of the collector... for the same reason you posted.
 
And a coil. With the air /fuel ratio so close there may not be enough I burned fuel in the exhaust to light. May need to add propane nozzle to help.
 
UPDATE....

As I was cutting the lawn on Sunday, I was thinking about How big of a job it was going to be to roll the truck off the 27' gooseneck trailer and push it into the barn.....with NO steering!!! That is the main downfall of having full hydraulic steering. You can't steer without the steering pump spinning.
Now you should remember that I smoked my motor and Coty insisted that we install his backup motor so we could attend an event last month.
In which I blew up that motor too!

Well... it has been too damn hot to mess with the truck out in the sunlight so it has just been sitting on the trailer all of this month.
I had remembered that I inspected the cylinders with my bore scope and was puzzled by the fact that the pistons looked good along
with the valves.
When I finished the lawn .... I walked into the garage and seen this small package that has been sitting on a chair for the last 5-6 weeks.
Now ...Alesia orders so much stuff online that the UPS guy is showing up daily! So much that I feel I have to send him a birthday card every year!

Well... I decided to find out what the hell this package was that she sat there...

I opened it up and found that it was a MSD rotor?
I then remembered that the old one had snapped on the first motor...and I musta placed an order for another one.

Now back when I was removing the broken one.... I had a crazy idea of JB plastic welding the locating tab back on the rotor and shelving it..

It was a week or two after that ....that Coty came over and we installed his motor into my truck....

Now upon remembering this ... I looked at Alesia with this new rotor in my hand and told her that it's a 1 in a million shot but
she might hear this truck fire up today....She just smiled and rolled her eyes at me.

NO SHIT!!!!! when I pulled the cap I had found the rotor was just free spinning in the dizzy.
I installed the new rotor and reinstalled the plugs and wires....... It fired up without hesitation!!!!!

Now you have to visualize that I am sitting in the truck which is still sitting on the trailer in total amazement at the new stroke of luck that
had just found me!!! When all of a sudden I hear Alesia out on the back deck whistling at me while she was jumping up and down waving her arms!

I am thinking LORD all MIGHTY..... The HOUSE is on FIRE!!!!! She is in her mid 50's and she is jumping around like a twelve year old girl
who just got her first pair of blue jeans!!!!

So I instantly shut the truck off and JUMPED ( I am 57 years old) from the seat off the truck to the ground...which is about an 8' drop.!!

After I hit the ground with which was a pretty cool TUCK and ROLL and bouncing onto my feet ...I ran as fast as I could to her rescue!!!!

What the HELL is it!!....I asked of her.

Now mind you she is still jumping up and down waving her arms.....She looked at me and shouted.... "YOU DID IT...YOU GOT THE TRUCK RUNNING!!!!!"

After my partial stroke and my daredevil manuvers exiting the truck.... I had to laugh at how excited she was that YES it is running.

Later that day I was explaining to Coty ...the events that transpired earlier....As we were all laughing...Alesia explained that the reason
she got so excited was the fact that she instantly knew she did not have to release any more money toward rebuilding another motor!
 
JohnHancock said:
If you need to pull the truck with a dead motor take off the belt and spin the pump with a cordless drill.
Click to expand...

I'd like to see you John head over heels in the engine bay of that truck 6-8 feet off the ground--talking topsy turvy!!!
 
JohnHancock said:
If you need to pull the truck with a dead motor take off the belt and spin the pump with a cordless drill.
Click to expand...

what I actually do is crank the motor over just long enough to turn the tires.
That is if the motor will still crank.

Coty and I have been discussing the idea of installing a snowplow pump in the engine bay with quick connect fittings on both the plow pump and the
power steering pump. That way , we can just pull the belt from the power steering pump and switch the lines over to the plow pump when needed.
 
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