I still have NO SPARK?????
Thread Starter
Full Member
Joined: Jun 2008
Posts: 140
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From: Canada
I still have NO SPARK?????
Ok so I still havent figured out why I have no spark. Here's a list of stuff I have tried or checked so far. (Turns over no spark)
-Tried new ecu
-Tried new CAS (had proper ohms reading for old one but thought id try another.)
-Tried new coils/igniters
-Checked all grounds
-Bypassed and checked air flow meter
-Checked all my grounds
-Removed boost/pressure sensor and checked the voltage on the two wires
-Main relay was blown??? Replaced that
-Checked plug wires and have 12 v
I really am confused here...does anyone know what else it might beI'm guessing there's a wire or connection right? Haven't I checked all the main parts?
-Tried new ecu
-Tried new CAS (had proper ohms reading for old one but thought id try another.)
-Tried new coils/igniters
-Checked all grounds
-Bypassed and checked air flow meter
-Checked all my grounds
-Removed boost/pressure sensor and checked the voltage on the two wires
-Main relay was blown??? Replaced that
-Checked plug wires and have 12 v
I really am confused here...does anyone know what else it might beI'm guessing there's a wire or connection right? Haven't I checked all the main parts?
Last edited by Hunter4Life; Nov 3, 2008 at 12:47 PM. Reason: Incomplete info.
HAILERS
Joined: May 2001
Posts: 20,563
Likes: 27
From: FORT WORTH, TEXAS,USA
Ohm out the CAS wires AT the ECU plug.
Again, from the ECU plug..........thru the CAS and back to the ECU.
Spare CAS? Connect it to the harness, key ON. Spin the CAS bottom gear. Spark should occur and clicking of the fuel injectors should happen.
Ohm out b/t 3G to 3H and then from 3H to 3E. Should be approx 220 ohms for each ringout. If memory serves. See FSM for accurate information.
Series five only for the above.
Again, from the ECU plug..........thru the CAS and back to the ECU.
Spare CAS? Connect it to the harness, key ON. Spin the CAS bottom gear. Spark should occur and clicking of the fuel injectors should happen.
Ohm out b/t 3G to 3H and then from 3H to 3E. Should be approx 220 ohms for each ringout. If memory serves. See FSM for accurate information.
Series five only for the above.
Last edited by HAILERS; Nov 3, 2008 at 01:31 PM.
Young Again
Joined: Jan 2008
Posts: 60
Likes: 0
From: Socal
These are the suggestions that I got from HAILERS. I had the same problem a little while ago. Mine was the AFM, but it sounds like you've ruled that out.
"You don't really need to ohm anything out. You need to pull the small, white, two socket plug off the LEAD coil assy. Then put the meter on volts dc. Positive lead on the black/yellow wire in that small white plug. Negative lead on a ground nearby. Like the base of the Lead coil assy or battery neg terminal.
No voltage? All fuses are considered to be good since you ALREADY looked at them before you wrote this thread. Common sense thing to do.
Pull the two wire plug off the Main Relay. Key to ON. Check the black/white wire in that plug for batt voltage. CAn't tell which is black/white and which is Black? Check both then. Should have batt voltage on one that is black/white.
No voltage on either? Well the black/white gets fed from the ENGINE fuse. Check or put in a new ENGINE fuse.
Here's the suggestion HAILERS gave me when I had the same problem. Mine turned out to be the AFM but it sounds like you already ruled that out.
You don't really need to ohm anything out. You need to pull the small, white, two socket plug off the LEAD coil assy. Then put the meter on volts dc. Positive lead on the black/yellow wire in that small white plug. Negative lead on a ground nearby. Like the base of the Lead coil assy or battery neg terminal.
No voltage? All fuses are considered to be good since you ALREADY looked at them before you wrote this thread. Common sense thing to do.
Pull the two wire plug off the Main Relay. Key to ON. Check the black/white wire in that plug for batt voltage. CAn't tell which is black/white and which is Black? Check both then. Should have batt voltage on one that is black/white.
No voltage on either? Well the black/white gets fed from the ENGINE fuse. Check or put in a new ENGINE fuse.
You HAD voltage at the black/white? Then pull the four wire plug off the Main Relay. Find the Black/Green wire in the plug. It should have batt voltage on it. No voltage? It gets fed by the 40amp EGI fuse in the engine bay. Fix that fuse or connection to it at the bottom of the engine bay fuse box.
Stuff like that takes a half hour or so. Not time or money consumming."
"You don't really need to ohm anything out. You need to pull the small, white, two socket plug off the LEAD coil assy. Then put the meter on volts dc. Positive lead on the black/yellow wire in that small white plug. Negative lead on a ground nearby. Like the base of the Lead coil assy or battery neg terminal.
No voltage? All fuses are considered to be good since you ALREADY looked at them before you wrote this thread. Common sense thing to do.
Pull the two wire plug off the Main Relay. Key to ON. Check the black/white wire in that plug for batt voltage. CAn't tell which is black/white and which is Black? Check both then. Should have batt voltage on one that is black/white.
No voltage on either? Well the black/white gets fed from the ENGINE fuse. Check or put in a new ENGINE fuse.
Here's the suggestion HAILERS gave me when I had the same problem. Mine turned out to be the AFM but it sounds like you already ruled that out.
You don't really need to ohm anything out. You need to pull the small, white, two socket plug off the LEAD coil assy. Then put the meter on volts dc. Positive lead on the black/yellow wire in that small white plug. Negative lead on a ground nearby. Like the base of the Lead coil assy or battery neg terminal.
No voltage? All fuses are considered to be good since you ALREADY looked at them before you wrote this thread. Common sense thing to do.
Pull the two wire plug off the Main Relay. Key to ON. Check the black/white wire in that plug for batt voltage. CAn't tell which is black/white and which is Black? Check both then. Should have batt voltage on one that is black/white.
No voltage on either? Well the black/white gets fed from the ENGINE fuse. Check or put in a new ENGINE fuse.
You HAD voltage at the black/white? Then pull the four wire plug off the Main Relay. Find the Black/Green wire in the plug. It should have batt voltage on it. No voltage? It gets fed by the 40amp EGI fuse in the engine bay. Fix that fuse or connection to it at the bottom of the engine bay fuse box.
Stuff like that takes a half hour or so. Not time or money consumming."
Thread Starter
Full Member
Joined: Jun 2008
Posts: 140
Likes: 0
From: Canada
Nope....I'm with a guy now who has been working on cars for 30 yrs and Rx7's almost as long...so hopefully we or rather.... he can figure it out. I have swapped every part possible as well as know for sure it's not any of the grounds. Keep you posted...should know by Wed or Thursday he is going to recheck some stuff
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