MSPNP not reading RPM
04-29-2008, 07:35 PM
#1
Elite Member
Thread Starter
iTrader: (3)
Join Date: Oct 2004
Location: lansdale PA
Posts: 2,494
Total Cats: 0
MSPNP not reading RPM
burnt my ignitor, replaced it now the tach in my dash works but ms doesn't read rpm, stays at zero and blips something every few seconds. is my new ignitor half broken or could it be my megasquirt?
0
04-29-2008, 08:04 PM
#2
Did you change anything in the MSQ or possibly knock a ground off while installing the ignitor? It's possible that the msq or firmware corrupted when you were attempting to run the car with the bad ignitor.
0
04-29-2008, 08:56 PM
#5
Elite Member
Thread Starter
iTrader: (3)
Join Date: Oct 2004
Location: lansdale PA
Posts: 2,494
Total Cats: 0
i loaded up my original MSPNP base map and copied all my values manually and saved the msq, loaded into MS... still no dice. i think something's physically broken but i don't know what it is. what sends RPM signal to ecu on a 1.6, the ignitor sends it to the tach, i guess the cas sends it to the ecu?
0
05-05-2008, 06:40 PM
#13
Boost Pope
iTrader: (8)
Join Date: Sep 2005
Location: Chicago. (The less-murder part.)
Posts: 33,020
Total Cats: 6,588
On the '90-'93, the dash tach is driven by the igniter.
On the '94-'95.5, the dash tach is driven by the coils.
From the '92 FSM:
From the '94 FSM:
In either case, this is different from the RPM signal on the MS. That is generated based on the CKP/CMP inputs from the CAS.
If you're seeing activity on the dash tach, and it looks realistic, that means that the coils are firing, which means the MS is doing something.
On the '94-'95.5, the dash tach is driven by the coils.
From the '92 FSM:
From the '94 FSM:
In either case, this is different from the RPM signal on the MS. That is generated based on the CKP/CMP inputs from the CAS.
If you're seeing activity on the dash tach, and it looks realistic, that means that the coils are firing, which means the MS is doing something.
0
05-05-2008, 06:42 PM
#14
Elite Member
Thread Starter
iTrader: (3)
Join Date: Oct 2004
Location: lansdale PA
Posts: 2,494
Total Cats: 0
yes my dash has RPM but the laptop connected megasquirt shows rpm at zero and every few seconds blips to some abritrary number for a millisecond and then back to zero.
0
05-05-2008, 06:47 PM
#15
Boost Pope
iTrader: (8)
Join Date: Sep 2005
Location: Chicago. (The less-murder part.)
Posts: 33,020
Total Cats: 6,588
I guess I should ask- is the engine running?
It's quite possible something is wrong in Megatune, possibly the gauge config in the msns-extra.ini file.
If you look at a log in MLV, do you see RPM there?
It's quite possible something is wrong in Megatune, possibly the gauge config in the msns-extra.ini file.
If you look at a log in MLV, do you see RPM there?
0
05-05-2008, 07:08 PM
#19
Boost Pope
iTrader: (8)
Join Date: Sep 2005
Location: Chicago. (The less-murder part.)
Posts: 33,020
Total Cats: 6,588
That's what was hanging me up.
I think the OP is saying that it does run, and he sees the dash tach OK, but MegaTune is not giving him an RPM indication on the virtual dash.
That, to me, sounds like a MegaTune problem. Either his msns-extra.ini is corrupt, or he's having serial comm issues, or something along those lines. Which is why I'm curious to see what MLV makes of a log.
Edit He beat me to it.
I think the OP is saying that it does run, and he sees the dash tach OK, but MegaTune is not giving him an RPM indication on the virtual dash.
That, to me, sounds like a MegaTune problem. Either his msns-extra.ini is corrupt, or he's having serial comm issues, or something along those lines. Which is why I'm curious to see what MLV makes of a log.
Edit He beat me to it.
0
