OBD I
codes 332, 337 ( I think )
1 of them is EGR flow insuffecent. the other is EGR/PFE circuit voltage out of range.
well the EGR system is known as a Pressure feedback system the way it works is the PFE or (pressure feedback) sensor monitors the exhaust gas pressure via rubber hose connected from sensor to manifold. difference's in pressure relate to the actual EGR valves position. the EGR vacuum solanoid controls the egr valve's actions.
Well the check engine light has apparently been coming on, flashing, and sometimes go's out. (thats what my grandmother told me it was doing.) It was solid on when I was handed the keys this morning. So I scanned it KOEO test pulled no immideate codes. only those 2 memory codes mentioned before. codes have been cleared and definitions wrote down.
Checked the EGR valve using a vac pump and it did show movement both engine idle and smoothness, so i would assume that the passage is open and the valve does move when VAC is applied.
I think is a faulty PFE sensor.
the engine had a very slight miss/unsmoothness at idle. I also noticed a slight pinging under heavy accelleration. its about to roll 100k plug and wire set has already been planned along with fuel filter. I'm trying to keep them from going and trading it in cuz I want it and eventually they will prob give it to me. both this 94 & my 87 mercs were both owned by my LATE greatgrandfather aswell as my grandfather.
any help would be appriciated.
codes 332, 337 ( I think )
1 of them is EGR flow insuffecent. the other is EGR/PFE circuit voltage out of range.
well the EGR system is known as a Pressure feedback system the way it works is the PFE or (pressure feedback) sensor monitors the exhaust gas pressure via rubber hose connected from sensor to manifold. difference's in pressure relate to the actual EGR valves position. the EGR vacuum solanoid controls the egr valve's actions.
Well the check engine light has apparently been coming on, flashing, and sometimes go's out. (thats what my grandmother told me it was doing.) It was solid on when I was handed the keys this morning. So I scanned it KOEO test pulled no immideate codes. only those 2 memory codes mentioned before. codes have been cleared and definitions wrote down.
Checked the EGR valve using a vac pump and it did show movement both engine idle and smoothness, so i would assume that the passage is open and the valve does move when VAC is applied.
I think is a faulty PFE sensor.
the engine had a very slight miss/unsmoothness at idle. I also noticed a slight pinging under heavy accelleration. its about to roll 100k plug and wire set has already been planned along with fuel filter. I'm trying to keep them from going and trading it in cuz I want it and eventually they will prob give it to me. both this 94 & my 87 mercs were both owned by my LATE greatgrandfather aswell as my grandfather.
any help would be appriciated.
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