No RPM Signal In MT
#1
Junior Member
Thread Starter
iTrader: (7)
Join Date: Aug 2006
Location: Binghamton, NY
Posts: 448
Total Cats: 1
No RPM Signal In MT
I finally decided to tackle a parrallel MSI build on my '97, but I'm having some issues.
I built and modded the board myself. Everything checked ok w/ the stim. Being a bit of a wuss (and its my DD) I'm connecting all the sensor inputs first to double check everything, then I'll add the fuel and spark outputs when its all settled.
I hooked up most of them w/ no issue. I soldered everything into the stock harness such that they are shared with teh stock ECU. (Boomslag parts on backorder) Down to the last one, RPM input. No start. I attatched the grey shielded wire to the position shown in Braineak's big DIY MS thread (white wire on the stock ECU). With the MS plugged in, the car won't start. When I disconnect it everything is normal.
I've checked that all my jumpers an mods are in palce and correct. I checked the schematic for the '96-'97 models but it doesn't look like there's an RPM input to the ECU.
Am I pulling the signal from the right place? Or should I look to MS hardware issues?
I am running COPs if that makes a difference....
Thanks.
--Alex
I built and modded the board myself. Everything checked ok w/ the stim. Being a bit of a wuss (and its my DD) I'm connecting all the sensor inputs first to double check everything, then I'll add the fuel and spark outputs when its all settled.
I hooked up most of them w/ no issue. I soldered everything into the stock harness such that they are shared with teh stock ECU. (Boomslag parts on backorder) Down to the last one, RPM input. No start. I attatched the grey shielded wire to the position shown in Braineak's big DIY MS thread (white wire on the stock ECU). With the MS plugged in, the car won't start. When I disconnect it everything is normal.
I've checked that all my jumpers an mods are in palce and correct. I checked the schematic for the '96-'97 models but it doesn't look like there's an RPM input to the ECU.
Am I pulling the signal from the right place? Or should I look to MS hardware issues?
I am running COPs if that makes a difference....
Thanks.
--Alex
#8
Junior Member
Thread Starter
iTrader: (7)
Join Date: Aug 2006
Location: Binghamton, NY
Posts: 448
Total Cats: 1
Tried again, not luck. Double checked the input mods. They all look and measure ok. D1 and D2 are jumpered.
CMP is hooked up with not issue. When I connect the CKP to pin 24 I get a no start. I tried disconnecting the stock ECU to see if signal sharing was the issue, but no RPM in MT.
--Alex
CMP is hooked up with not issue. When I connect the CKP to pin 24 I get a no start. I tried disconnecting the stock ECU to see if signal sharing was the issue, but no RPM in MT.
--Alex
#13
From how I read it, Alex can't get his tach signal to read. He also can't start his car when the MS is plugged in. The MS is not hooked up to control anything, but just to read sensor inputs.
Perhaps you've wired one of your sensor inputs to the wrong wire and it's wired to an output of the MS, causing the signal to the ECU to be extremely wrong and the car won't start.
Perhaps you've wired one of your sensor inputs to the wrong wire and it's wired to an output of the MS, causing the signal to the ECU to be extremely wrong and the car won't start.
#14
Junior Member
Thread Starter
iTrader: (7)
Join Date: Aug 2006
Location: Binghamton, NY
Posts: 448
Total Cats: 1
As it turns out there was a single strand of shield grounding the CKP signal. Should have known to check that sooner. It's almost aways a silly little problem. All is good now.... On to outputs.
Thanks for the help.
--Alex
Thanks for the help.
--Alex
Thread
Thread Starter
Forum
Replies
Last Post
Zaphod
MEGAsquirt
47
10-26-2018 11:00 PM
JesseTheNoob
DIY Turbo Discussion
15
09-30-2015 02:44 PM