91 Cel 9 code and performance problems
#1
91 Cel 9 code and performance problems
Hey guys. So I've been having a problem with my 91 accord. When the car has been running for a while (over 15 mins usually) it would start to have small "stutters" with the RPM's and when you go to push on the gas from a full stop the RPM's will drop then shoot back up. Sometimes the engine will even cut out before the RPMs have a chance to come back up.
I've also noticed while driving (past that 15 min mark) that I'm getting fewer RPMs in general. For example, when I'm cruising at 60kmh I usually get to almost 2000RPMs. But past that 15min mark or when I start to notice the other signs of trouble (RPM drop after pushing on the gas at a full stop) then I usually get around 2500/2600RPMs.
I do also have a check engine light and a cel code of CYP 9 - Cylinder sensor.
Does anyone know what this might be? I've talked to a friend and they though it might be my timing.
I've also noticed while driving (past that 15 min mark) that I'm getting fewer RPMs in general. For example, when I'm cruising at 60kmh I usually get to almost 2000RPMs. But past that 15min mark or when I start to notice the other signs of trouble (RPM drop after pushing on the gas at a full stop) then I usually get around 2500/2600RPMs.
I do also have a check engine light and a cel code of CYP 9 - Cylinder sensor.
Does anyone know what this might be? I've talked to a friend and they though it might be my timing.
#2
CYP sensor is one of the 3 timing sensors inside the distributor. Look for dirty/loose/corroded connections in the wiring harness plug at the distributor.
I don't think it's as simple as adjusting the spark timing.
I don't think it's as simple as adjusting the spark timing.
#5
I had this fault on 94 EX and after replacing distributor found the ECM was the problem.
Measure distributor sensor resistance against spec (?). If sensor resistance is zero or infinite, then a new distributor is required. If it measures w/i spec, suggest further checking resistance at ECM connector (to rule out wiring fault). If resistance is again OK, then replace ECM (used are readily available).
good luck
Measure distributor sensor resistance against spec (?). If sensor resistance is zero or infinite, then a new distributor is required. If it measures w/i spec, suggest further checking resistance at ECM connector (to rule out wiring fault). If resistance is again OK, then replace ECM (used are readily available).
good luck
#6
I had this fault on 94 EX and after replacing distributor found the ECM was the problem.
Measure distributor sensor resistance against spec (?). If sensor resistance is zero or infinite, then a new distributor is required. If it measures w/i spec, suggest further checking resistance at ECM connector (to rule out wiring fault). If resistance is again OK, then replace ECM (used are readily available).
good luck
Measure distributor sensor resistance against spec (?). If sensor resistance is zero or infinite, then a new distributor is required. If it measures w/i spec, suggest further checking resistance at ECM connector (to rule out wiring fault). If resistance is again OK, then replace ECM (used are readily available).
good luck
I'll test it when I can get my hands on a multimeter. And your suggesting replacing the ecm even if the resistance is okay?
The problems started a couple of months after I replaced the distributor.
#8
What Tex said was to measure the sensor resistance, then measure it again from the ECU plug to check the wiring. If it's bad either way, you found a problem to fix.
If the sensor and the wiring are OK, then what's left is the ECU.
If the sensor and the wiring are OK, then what's left is the ECU.