305 tpi with 7427 pcm Possible?

[Aholt91ss]

mine just did the opposite with jumper it sound like it was missing cylinders before i did the jumper now did the jumper it runs a little smoother
i figured the memcal was a tbi v8 memcal but i seen in the tbi to mpfi zip file it was the port mod

but when i rev the motor there is a pause then revs

also have the large HEI coil in cap distributor

[EagleMark]

You have the Latency correct for a large cap, sorry...

Looking at your bin...
1. "Injector Flow Rate (MPFI lb/hr) " is for one injector, yours is set to 156.8! WOW! That's a big injector?

2. "Code 51 EPROM Checksum Failure" is unchecked? How will you know if there is something wrong?

3. "Stoichiometric AFR " Set to 14.1 unless your using Non Ethonaol or race gas.

4. "Open Loop AFR vs. Temperature vs. Vacuum" Set the entire table to 14.1... unless you want to run 16.0 to one before closed loop?

5. "Async Short BPW Offset vs. BPW " is not set correctly for MPFI
274.7
228.9
198.4
152.6
122.1
76.3
45.8
15.3
0.0
0.0
0.0
0.0
0.0
0.0
0.0

6. Why 11 degrees Initial spark?

7. Spark advance table is wild high? 30 degrees at 1000 RPM 50 MAP? Where stock is 20? Or 38 degrees at 2800 RPM 75 MAP where there was

15? Maybe start with Dave W Vortec Spark table and calm that down a bit, you don't even have a knock sensor yet?

Then after all that if you still get a pause before accereation double
1. "AE vs. MAP Difference"
2.AE vs. TPS Difference"

[Aholt91ss]

ok corrected this i had it set at 19.76 mpfi gm/sec not lbs/hr oops
just a question why 14.1 and not 14.7 running 93 octane gasoline is it for the e10

[EagleMark]

Yup!

http://www.gearhead-efi.com/Fuel-Inj...g-using-Lambda

[Aholt91ss]

good read for almost anyone in hotrodding ought to be a sticky in like genral info or something
helping the brain

[Aholt91ss]

ok i tried the bin out now its idling at at 1500

[Aholt91ss]

6. Why 11 degrees Initial spark?

7. Spark advance table is wild high? 30 degrees at 1000 RPM 50 MAP? Where stock is 20? Or 38 degrees at 2800 RPM 75 MAP where there was

it shows 5 degrees initial spark in my bin
i swapped the ve and spark tables from the AWFU $88 5.0 bin

[EagleMark]

it shows 5 degrees initial spark in my bin
i swapped the ve and spark tables from the AWFU $88 5.0 bin

I must have made a mistake but I do see 6 now, where is your distributor set?

Big problem with taking spark Maps from other definitions/masks/XDF is does the other one have the Main Spark Bias subtracted from what you see in Main Spark Table? If not you copied in 9.84 degrees to much!

$0D has the Main Spark Bias removed from what you see, what you see is actual! Is the other one? It looks to be OK in $8D, but that is a lot of spark, I hope this is a light car with high numerical gear ratio and a KNOCK SENOR!

It should not idle 1500 RPM even cold. My first guess to this is a vacuum leak... look at data, what is IAC count?

Did you get the "Injector Pulse Width Correction Vs. Battery Voltage" from $8D to $0D?

[Aholt91ss]

well it is a camaro with 2.73 gear but no it does have a knock sensro but not ther right one
i got all vacuum leaks taken that i know of it was idling lower before but ill recheck and check again
i took the inject offset v battery voltage from the ftm 6870 bin
i dont have a timing tab on my cover but i tried getting it close to where 5 degrees should be

[EagleMark]

I have no idea what a ftm 6870 bin is from? You need the Injector offsets from a bin that the injectors came from.

[Aholt91ss]

i assume this would be stock bin for car

it was under 1226870 $1F info

[JeepsAndGuns]

Not sure why you needed the jumper on Memcal? Is it a V8 Memcal? If so the jumper is not needed and may be something in bin wrong. We found this awhile ago and I verified it on a good running $0D MPFI system, it ran great without jumper and ran horrible with jumper?

Really?!? This is the first I have heard of this. I have the jumper installed in my memcal because thats what the MPFI conversion instructions said to do. Now you make me want to try it and see what happenes.

[EagleMark]

I thought you were in on that conversation? If you have a V8 memcal then the TBI to MPFI can be done on software side. 1project2many had explained it but I can't find the link.

[dave w]

Really?!? This is the first I have heard of this. I have the jumper installed in my memcal because thats what the MPFI conversion instructions said to do. Now you make me want to try it and see what happenes.

I've done a couple MPFI conversions, both with modifying V8 Memcals. Works well for me that way!

dave w

[Aholt91ss]

yesterday i tried same bin without jumper(because i seen somewhere on this site not to have jumper but tried anyways for s&g's) sounded like it was missing then i went inside and jumpered the memcal it ran a little bit smoother to me but like mark said there maybe something wrong in the bin