G
Guest
·I've been driving for a while with an MIL warning... haven't had time to figure out the problem but now I'm attempting to solve it.
It's a DTC 32... EGR system.
I took the long way to diagnose the problem... i figgured that out afterwards...
-Checked the canister, working fine
-Checked the EGR for lifting, it wasn't.
-Took out the EGR, cleaned it out, it seems to work fine
-Put EGR valve back in, unhooked vacuum hose, no vacuum signal (ever)
-Traced vacuum hose back to EGR solonoid, no vacuum coming from there either
-Took out solonoid, tested. Works fine.
-Looked at EGR temperature sensor (I don't know why I did this because of course that's not the problem). Resistance is fine.
-Finally decided to look at the signal from the ECU to the EGR solonoid by reading the voltage at the harness with a VM. There is always a 14v signal no matter what... cold engine, warm engine, revving from 2000-4000, revving high.
-Rev the engine with the harness off and the EGR valve lifts fine. The signal from the ECU looks screwed.
Anyone know what would cause the ECU to continually send a signal to the solonoid, preventing the EGR valve from opening at all?
Thanks
Brett
It's a DTC 32... EGR system.
I took the long way to diagnose the problem... i figgured that out afterwards...
-Checked the canister, working fine
-Checked the EGR for lifting, it wasn't.
-Took out the EGR, cleaned it out, it seems to work fine
-Put EGR valve back in, unhooked vacuum hose, no vacuum signal (ever)
-Traced vacuum hose back to EGR solonoid, no vacuum coming from there either
-Took out solonoid, tested. Works fine.
-Looked at EGR temperature sensor (I don't know why I did this because of course that's not the problem). Resistance is fine.
-Finally decided to look at the signal from the ECU to the EGR solonoid by reading the voltage at the harness with a VM. There is always a 14v signal no matter what... cold engine, warm engine, revving from 2000-4000, revving high.
-Rev the engine with the harness off and the EGR valve lifts fine. The signal from the ECU looks screwed.
Anyone know what would cause the ECU to continually send a signal to the solonoid, preventing the EGR valve from opening at all?
Thanks
Brett