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morning thought - try changing angular tooth width to 30 like Droops has.
thinking is...due to the tooth divider the "number of teeth" is 12. 12x30 = 360 (degrees). on my NA I have 10 "teeth" sized 36...10x36 = 360.
if your value is 60 you're coming out to 720. so perhaps your ECU thinks your flywheel is twice as big as it actually is which it only fires half the cylinders?
Well, I was loaned a new VEMS and adapter harness to test with. I plugged it right in, ran the same tune, and viola! The car runs beautifully on all 4 cylinders. There are many discrepancies between the pin outs on the VEMS and Bosch sides. Either these discrepancies are causing a no/poor start OR my ECU is bad.
I have made a spreadsheet outlining the discrepancies. None of which would lead me to believe it should have damaged my ECU. Thoughts?
I remember Peep stating that the Flyback wire needs to go to KLR pin 6 (U (sheet)). On the new ECU, flyback is going to KLR 6 as well as 12V power from DME. However, on my harness, there is no wire going to KLR Pin 6, but Flyback is still getting 12V power via DME pin 35.
Also, my tachometer does not work with the new ECU-- my DME pin 21 (tach) goes to EC18-4 (Stepper A) and works fine. But the new one goes to EC36-4 (P259 ch.4) and does not work.
Wanted to see if anyone has an input for my VEMS PnP no start concern. Its an 88 951, before VEMS install vehicle had 3 inch turbo back exhaust, Vitesse stage 2 turbo, LR dual port waste gate with manual boost controller, High volume fuel pump and 3 Bar FPR, vehicle started and ran fine with this set up (had boost turned down due to not having enough fuel to match). I purchased the kit second hand but it was new and never installed. The kit was ordered for an 89 turbo S my car is a non S (I don't believe this should make a difference) he sold the car never installed the kit and sold it to me. I installed the kit installed temp sensor in charge pipe right before the throttle, calibrated the wide band O2 sensor (was not install at that time) with no issues, when calibrating the throttle position sensor I can calibrate the 0% without issues but found it indicates 100% throttle or 255 when its only half way open when calibrating WOT. Installed 72lb/hr low Z injectors and input injector information 6.49 x (2500/4/756) =5.36. After inputting and calibrating, found engine will turn over and will not start. Was I incorrect with changing the req_fuel and injector flow rate config? I have attached the current config that is being used. Any information is helpful
I have not I only input the injector size. Is it capable of running the low Z or will resisters be needed? I’m clearly new to the setting up of a stand alone system.
I what I've read is correct factory injectors are a low impedance injector around 4.5 ohms and the 72lb low Z injectors I just installed are 2.2ohms and the PWM settings that came in the VEMS are set for factory injectors I would think it would be capable of running them.
VEMS will run low or high, you just have to have the settings right.
I don't know what the values should be for low, but for high-impedance you set injector settings PWM to 100% and the next box to 25.5ms.
One thing I have noticed is that reqfuel isn't really that accurate and frequently you need to increase that number to get the car to run happily.
Well, I was loaned a new VEMS and adapter harness to test with. I plugged it right in, ran the same tune, and viola! The car runs beautifully on all 4 cylinders. There are many discrepancies between the pin outs on the VEMS and Bosch sides. Either these discrepancies are causing a no/poor start OR my ECU is bad.
I have made a spreadsheet outlining the discrepancies. None of which would lead me to believe it should have damaged my ECU. Thoughts?
I remember Peep stating that the Flyback wire needs to go to KLR pin 6 (U (sheet)). On the new ECU, flyback is going to KLR 6 as well as 12V power from DME. However, on my harness, there is no wire going to KLR Pin 6, but Flyback is still getting 12V power via DME pin 35.
Also, my tachometer does not work with the new ECU-- my DME pin 21 (tach) goes to EC18-4 (Stepper A) and works fine. But the new one goes to EC36-4 (P259 ch.4) and does not work.
I am having basically the same problem as you, everything seems good but it will only run on two cylinders, very rich. I have a Lindsey racing injector harness installed, which has a wire T into klr pin 6. Did you find a solution there?
I had time this evening to mess around with the car again and tried req-fuel setting from 5.5ms -10 and found still will not start with 72lb low Z injectors still installed. Removed plugs and found no fuel soaking so I removed the fuel rail from the intake and cranked engine over and found injectors are firing fuel. Checked and found no spark is present, tried to bypass the factory alarm and found still dose not have any spark. When cranking the VEMS does display RPM reading, has anyone had issues with no spark with vems set up and or the factory alarm causing issues when installing vems?
If anyone can confirm if this looks like a normal trigger signal
I had time this evening to mess around with the car again and tried req-fuel setting from 5.5ms -10 and found still will not start with 72lb low Z injectors still installed. Removed plugs and found no fuel soaking so I removed the fuel rail from the intake and cranked engine over and found injectors are firing fuel. Checked and found no spark is present, tried to bypass the factory alarm and found still dose not have any spark. When cranking the VEMS does display RPM reading, has anyone had issues with no spark with vems set up and or the factory alarm causing issues when installing vems?
If anyone can confirm if this looks like a normal trigger signal
Have you checked gap of speed and reference sensors? How old are the sensors?
Trigger is not normal on cranking. I'll post when I get the chance to.
I have not checked the gap on the sensors. I have owned the car for 16 years and have never replaced them I would assume they are original with 78k, but I never had a reason to replace them due to the vehicle having no running issues until trying to install vems, So vems can have an issue reading the sensors due to the gap but the 33 year old DME has no issues?
06-10-2020, 08:25 AM
