yeah how do you have the power to the pump ran now? you should be able to run the pump with just turning your key to the on position and then you can check for flow, leaks, air bubbles, etc.

if you do get rid of the filler neck i would definitely suggest going to a flow through system...works very well and also easy to get air bubbles out of the system.

 

Well, I am run off the factory fuel pump fuse because it only works when the fuel pump is on. I don't want to be sitting in my car with the radio on and the darn IC pump is running. I wired it to the fuel pump fuse using this.




At any rate, I went out there this morning and started messing with it. I took the add-a-cirucit thing out of the fuel pump fuse and I put it into the heated seat | trunk release fuse as I read on the board here that it has constant power. (Fuel pump not engaged or on since not using the fuse at the moment).

I could then hear the pump running and it was a little loud and making some garling noises. The level would drop a little and then I would add a slight amount (probably amounted to a few tablespoons).

After letting it run for 5 minutes or so the pump started to get quieter and then I would hear the garling again. It sounded like when it was quiet that it wasn't working... but I got under there and I could hear the fluid running through the H/E and I could feel it moving by touching the hoses.

Then I would hear the garling again. It appears that the gargling is the air in the system (going through the pump), because a couple of times when it did that air bubbles would come out of the reservoir.

After messing with that for about 30 minutes it got better... so I took her out for a spin for some data logging.

The first time everything went well, no issues (except for the active handling). I came home and checked the fill neck again and it was slightly low. Filled it up and went out again data logging and I was doing a couple of WOT runs... and the active handling was angry, lol.

At any rate, in the middle of that the P0108 check engine light came on again.
DTC P0108: Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage

Do you know why it would come on in the middle of a drive?

I came home and cleared it and it went away.

With looking at the laptop and holding the box in my lap it was hard keeping an eye on the gauges but it is possible I think I hit 13 PSI or so with this pulley. I will have to take it out again.

When I came home the 2nd time the fill neck only needed a couple of teaspoons.

I should have done the flow through. I will have to work on that.

Data logs sent to Vince.

It is also hard to see the A/F ratio at WOT as car gets crazy (wants to run) and I'm trying to look at the gauge and look at the road.

 

It seems to work pretty good for me...I can't tell if there's any air in there or not, but I doubt it...

It's like a little waterfall, haha.

 

who did the powdecoating for you?

 

So yours comes from H/E with a tee to the reservoir and then from the reservoir to the top of the end plate?

I'm asking because I'm thinking about getting rid of this stock fill neck and getting the option B (redline) tank. But both my inlet and outlet on my ZZP H/E are on the same side (driver) so I would have to come all the way from driver, to passenger (tee) and then back to the top of the end plate?

Mike Golding does all of my stuff. He is a fellow vendor on the Corvette Forum. You can see all of his stuff at www.thepowdercoater.com.

Any ideas anyone on the MAP sensor code while driving??

 

Negative.

That's how I originally had it setup; Out of endplate, to tee which went to reservoir and to heat exchanger, out of H/E, into pump, out of pump into endplate.

How I have it now, it goes out of endplate, into reservoir (top), out of reservoir into heat exchanger, out of H/E into pump, out of pump into endplate.

 

Yes, I see. Before it was just a reservoir, now it is a flow-through. Got ya. I am going to look into doing this.

Anyone have any ideas on my MAP sensor code while driving?

Still waiting for Vince to get back to me on my data logs.

 

Ok it is awful quiet in here. No one can help or has any ideas? LOL.

Vince got back to me last night and it appears my car is not going into power enrichment mode. Not good. He doesn't see anything wrong with the tune so he wanted me to data log it again today.

Here are my results.

Got into vehicle. Hooked up to EZ Flash and there were no codes.

Took it out for lap-driving-1 driving log and I hit 4-5lbs of boost a couple of times. At the end of the run, I pulled over and checked if there were any codes. P0108 was present but not displaying as a check engine light. I cleared the code.

Continued on for lap-driving-2 driving log and again I hit a few pounds of boost. Not trying to get into the gas or anything, it just happens. Got home this time and checked for codes. P0108 was present again, but not displaying as a checking engine light. Cleared the code.

Ok Vince just emailed while posting this.

Ok, we are getting power enrichment now – so my suspicions were correct – the MAP sensor code is causing the ECM to use a default MAP value.

I will try disabling the P0108 and see if this fixes it.

Started the car up in the street and pulled it into garage. Checked for codes and no codes were present.

.... my question is I wonder what is causing the MAP sensor to flake out?

 

So, the MAP is causing these issues?

 

defective MAP? i forgot, you're using the 1bar from the 2.2? or the 1bar from the LSJ SCIP?

 

i have the LSJ MAP if your interested, the 1bar that goes on the blower, i bought it to plug the hole on the blower...lemme know if you need it...

 

He never got the 1-Bar LSJ MAP to work correctly due to the wiring on the LAP - he's using the LAP 1-Bar MAP...

 

oh ok...well than n/m, was trying to help, would of let mine go for 25shipped...30 if he wanted it overnighted :p

 

Yes, LOL.

I thought defective MAP. Not the case as I'll post in a minute. Using the LAP MAP.

That is kind of you, but I am a dealer remember, lol. I have 2 at work... in which 1 I returned

I got it to work correctly (wired, anyway), but the voltage was spiking even with the car turned off so Vince asked me to put back LAP MAP

Ok here's an update. Weird stuff... but it is a good update! Here's what I wrote to Vince basically.... but tonight Vince sent me an updated tune removing the P0108 code. I was too curious to see if the MAP was flaking out or if I was really getting power enrichment, so I brought the Tech 2 home and did some testing.

Here's what I wrote.

Hi Vince,

Here’s an update for you.

I now understand why the numbers were changing so fast on me the other day that I couldn’t read them. (Telling him the numbers were changing on my A/F gauge... like 15... down to 10.9 quick then fasting back to 15... numbers were scrolling!)

Before I loaded the tune I decided to do some looking at the data with the Tech 2.

The Tech 2 has a power enrichment data view and it is basically yes or no.

When I would get on the throttle the power enrichment would only come on at the top of the gear and would go off as soon as I would lift to shift. When I would go into the next gear, it would not power enrich until the higher rpm of that gear.

So the power enrichment was only coming on for like 1 or 2 seconds, which is why my A/F ratio gauge would come down real fast to the 11’s or so and then spike back up to 14.

It also set the code right away.

As you know the P0108 code is when the MAP is 4.80 volts or more for more than 5 seconds. We watched the voltage with the Tech 2 and also did a snapshot and the voltage only hit 4.71 and was maxxed. Perhaps the ECM is picky enough to throw the code at that point.

At any rate, I came home and loaded the tune with the P0108 removed and it was a different story. As soon as I would get into the throttle we would have power enrichment right away, all the way through the gear. I could see 12.0 – 12.2 at WOT.

This was during the lap driving 1 file. While data logging the lap driving 1 I stopped at a light and it seemed the A/F ratio spiked to 16.2 and then I pulled out and went back to WOT… no big deal. I checked after finishing the lap driving 1 and I had a P1174 which is fuel trim code…. and you already mentioned the fuel trim needed adjustment, so that will be fixed.

I cleared the P1174 code and did lap driving 2 data log. All was well and it was still 12.0 – 12.3 WOT and when I stopped at a light or whatever the A/F ratio was fine. I ran it a little hard during the beginning of lap driving 2 and then was in some stop light traffic and the A/F ratio was still ok.

I checked for codes when I got home and there weren’t any. Perhaps that quick spike to 16.2 set that P1174.

Oh, last but not least… with it not setting any P0108 code it doesn’t give me any more problems with the traction control.
I forgot to tell Vince that in the beginning tonight with the tune not fixed yet, my traction control and AIRBAG light were going off and on.

Now I don't have any further traction control issues... but funny thing... with the traction control on she still spins the wheels!

When I put my interior trim back in I must not have put the button back together properly for my traction control because I cannot turn the traction control off. I will have to fix that tomorrow.

If I turn that off my poor Pirelli P6's are going to get burned down.

LOL. This is all on 87 Octane yet.

 

Well, Vince said the logs look great. He wants to richen it up from 12.0 - 12.3 to 11.7 - 12.0.

I am also going to install my 2.9 pulley this weekend and then Vince said he's look at the logs again.

 

Holy **** - still on 87?

I cannot wait to get my new supercharger on, and get it tuned so it's not lean anymore...maybe one more datalog if necessary, but that should do it.

 

Yes, before my SC was installed I filled up with gas. I didn't know my friend wanted to get started. I still have 3/4 tank or more left.

I'm sure when I get the high octane in there she'll run even better. Today I'm going to install my 2.9 pulley and take my dash trim piece off with the traction control switch and fix the switch.

 

Holy hell. I installed the 2.9 pulley today. This is something, lol. I took it for a ride to make sure everything was ok with the pulley and I know I hit 14PSI, not sure how much more she has. It was a short ride.

Then I took it out again to data log for Vince again so I wasn't paying much attention to that gauge this time.

The difference in size was very minimal, but the car seems like an animal now.

I am going to take to the dyno in like 2-3 weeks when I'm totally finished with everything.

Since I was data logging I didn't have the interceptor hooked up. It would be nice to see how much HP the interceptor says I have.

 

Well, if you felt that much of a difference going from 3.0 to 2.9 - I cannot wait to feel the difference between 3.06 and 2.9...

 

lol. yea, 3.0 to 2.9 is a def. noticeable difference...lol
i have had a 2.8 for a while now, but i would have to wire in the 60lb injectors first, and i would rather just do my whole build and tune for that anyways

 

lol. yea, 3.0 to 2.9 is a def. noticeable difference...lol
i have had a 2.8 for a while now, but i would have to wire in the 60lb injectors first, and i would rather just do my whole build and tune for that anyways

 

I should have taken a picture, but I put the 2.9 pulley on top of the 3.0 on the bench and there was just a little pulley sticking out around the sides. For it to make that much of a difference that is nuts, lol.

The difference was certainly incredible.

I had the pulley off in like 10 minutes, but trying to torque the bolts down on the engine sucked. I ended up using a large screwdriver to hold the pulley in place which kind of messed my radiator support up a little. No big deal... I bent it back a little with the channel locks and touched it up.

I should go out and invest 4.00 at Harbor Freight, lol, for a strap wrench. That would probably hold it enough to torque.

It did seem as if my hand did torque them enough, but I didn't want the pulley flying off.

 

i torqued mine as well as i could with a friend holding the blower, keeping it from spinning, and then once it was on the car with the belt holding it in place, i made another pass on the bolts

 

Thanks for letting me know. I believe I tried without holding the pulley while the belt was on and it didn't seem to want to hold.

I think I'm going to get one of those $5 strap wrenches and see what happens with that for next time.

Today I finally drove it to work. It is about an 80 mile round trip. It was fine on the way to work and no problems on the way home.

It is kind of hard at the times I'm out to really get on it because of traffic, but I saw it climb into the high 250's in HP on the interceptor. I only got to do it once and I wasn't at the highest RPM. I also am on 87 octane, so probably like Casey in the 265 HP range.

 

Well, I tried to get on last night and post but nothing would work here, lol.

I was finally low enough on gas to get some 92 Octane. On the way home last night from work there wasn't anywhere to take a blast really, so I had to wait till this morning.

Inadvertently I also got into a race, wtf. Anyway, there was this light I was lagging back hoping it would turn red so that I could lay into it a little bit to see what the HP on my interceptor said with the high octane.

There was a Volkswagen GTI?? In front of me and the light didn't turn red, we all just slowed down and then the GTI moved over to the right lane. I didn't think anything of it. At any rate, I downshifted into 3rd gear and let her rip and for about 2-3 seconds it was showing 275HP. NICE!

At any rate I got back down to 55 or 60 since we were coming up on a place where the cop sits. I look back in my mirror to check for any troubles (police) lol, and the GTI was coming hard. I was wondering why he was driving like that. I guess he thought I did a blow by on him lol... and I was just checking my gauge.

Anyway, it went from business highway to normal highway and he closed up the gap quick to get beside me. At this point I was already doing 70 or more, but anyway he got beside me and gave it hell and I didn't even downshift or anything, lol and I gave her what she had and I immediately started to pull away. I got to about 120 and he was largely way back there. lol.

Even as I started to pull away I waved in my rear view mirror. He never got back up on me again. It is a lame kill story and I wasn't even expecting it... but it is good to see my hard work paid off once already.

I am certainly going to dyno it soon and find out my exact number... but perhaps I'll get a CAI by then or something.