temp corrections are very drastic for me. if i unplug my temp sensor it pegs 10 on my wideband. let me know if you find anything

ross

 

I'd like to thank everyone for the feedback so far. I will be opening things up again on Sunday and checking everything over. I will most likely be returning the crawford back in before making a quick road trip to Chi-Town to visit my old friends @ SP.
If its the plenum, I would like them to be involved in putting it in and re-tuning.
I think it would be the best way to go regardless.
Anyone think the MAP sensor for the ProEFI could be fried? I guess I can find out when I re-install the Crawford. Either way, I'll double check everything Sunday.
If the crawford goes in and everything is back to normal, I will know with some certainty that it is the plenum...wouldn't you all agree? Especially if I keep the same vacuum block in place which is my intention.

 

I will loctite them on Sunday. Thanks for the heads-up.

Car was tuned with 1200cc's with Crawford Plenum (NOT Cosworth).

VE Tuning

 

Randy, cant you just read the MAP sensor on the CAN gauge?

 

PM'd

 

Is it a GM sensor....mine died just out of the blue one day.

PS Lock Tite the end cap bolts

 

Not sure what brand the sensors are actually.

Thanks. I will loctite all the Allen screws for the end caps. Thanks.

 

Should be a kavlico sensor. Have a pic Randy?

 

Unfortunately not now. Working until 1am on the ambulance today.
I have tomorrow to play with it. I will take a pic and post it up Larry.

 

Hmm this is disappointing. I really was lookin forward to buying this manifold! I sure hope it's sumthing else n not the manifold!

 

A lot of people made good power with this plenum, the car needs to be tuned for it to benefit from this upgrade.

 

Yes I would agree. /\ /\ /\ This thread was not made to condemn the Cosworth, just to find out if anyone had found themselves in a similar situation.
If I find out that after returning the crawford plenum and changing nothing else that it runs well, than that would mean to me that the car just needs to be re-tuned to utilize the Cosworth plenum. Not a big deal to me Just a 12 hour trip to Chicago, re-tune and I'm good to go. Now if I find out that I lose a significant amount of horsepower, I'll be upset.
But who knows, maybe I'll find out that I'll be saving some fuel when idling and on the low end, not really sure, but we shall see soon enough.

 

Damn bro, 12 hour road trip not a big deal? Sheeeesh! How much would u gain over the crawford plenum as opposed to the Cosworth? Would the 12 hour road trip gas money be worth the difference in hp? Big question there!

 

The quest for more horsepower is always worth it

 

I have to drive 9 Hours to ATL for a tune

Yes it is

 

Hopefully, I'll be driving 5 hrs to ATL for a re-tune!

 

Well here is where we are at the present moment. I sent the ProEFI to Larry last week for a minor programming tweek. Turns out that it helped a bit. When the car idles it still goes to 10 on the AFR, but when driving it goes lean I would assume from the improved air flow. Cruising is ok at 14 AFR but its not consistant really. The light boosting I did showed the AF at 13.0-13.5 and in that general neighborhood. No where near the 11.5 I was tuned for.

I also took the time to locktite all of the end caps and quickly found out why so many folks made mention of that point. 16 of the 18 allen head bolts were finger tight and very easy to remove. Yes thats right. And I didn't even drive the car 2 miles since installing.

Cosworth owner's beware!!! Please take a moment to loctite all of the allen head bolts when assembling the endcaps. This should be in the install instructions!!!

Other than that, I checked all of the hoses and they are all on and very snug. There is far less hose than previously because they don't have to be Tee'd and run all over the engine bay. So it was a fairly easy check.

RESULT:
Car needs to be re-tuned.
No vacuum leaks.
The boost display of the CAN gauge matches that of my AEM wideband gauge (each on different banks)
The o2 multiplier is showing .85 at idle and goes to 1.0 and up when cruising and giving light throttle inputs.
Idle is simply too rich and must be adjusted. Cruising isn't too bad. Obviously WOT is not even an option right now. I gave it very brief WOT inputs to see where it would go and it went to the 13's.

 

I am concerned a little bit about a new noise I think...A very light whine (barely audible) which might be an endcap just pissing out just the smallest amount of air when boosting. I checked the hoses and had to remove the allen bolts that secure the Cosworth to get to the very last end cap bolt. You all know which one I am referring to. The one that is covered up by the Oil filler neck. Unfortunately I was almost done loctiting them all and came upon this one. I was forced to lift up the Cosworth Plenum to access the last bolt. After Loctiting it, I re-assembled everything and torqued it down to spec. All good.

Then on returning home, I boosted while watching my gauges and made notice of this new sound. I am led to believe that after the allen end caps bolts loosening, it may have created a place for air to escape. I guess I'll have to investigate that at another point and time. My day is done for now. I have a family event to get to and had to put the car away for now. I do not like driving it in such a rich condition, but it seems that I am only affected by this when at idle or stopped at a light. If I were to make such a trip to Chicago which is 99% all highway, should I be concerned about hurting the car for those brief stops along the way???

I may ship the EFI unit back to Larry 1 more time to cut fuel at idle and on low end to minimize any possible engine damage, or O2 sensor damage (6 altogether), etc...

 

I took off my Cosworth yesterday just because of the suggestions of this thread and put thread locker on my allen bolts. As Randy say they were finger tight compared to when it was first installed and made sure to be snug.

 

Is there no way for you to access the EMS to send him a copy of your map, let him tweak it, and upload the new tune? Is it locked?