This car was having a CE light at idle (1223 code), a rough idle, & it stalls when I let off the throttle when coming to a stop. It will start right back up, but I have to feather the throttle in order to get it to hold an idle. The stalling occurs regardless of temperature.
Servicing the injectors & replacing the dog bone engine mount got rid of the rough idle. Replacing the AFM got rid of the CE light at idle. A review of the service records indicated that the AFM had been tampered with in the past.
I'm now stuck with it stalling when I let off the throttle. If I wait until the car gets down to around 1500 RPM's before disengaging the clutch, it won't stall. However, if I let off the throttle & disengage the clutch at normal engine speeds, it will stall immediately. There is no sputtering or anything like that; it just dies as if the ignition switch was shut off. It will start right up again, but sometimes, I have to open the throttle a little on re-starting.
I put a smoke machine to it, & I saw that the idle controller & the EGR valve both leaked; not the gaskets or hoses, but the devices themselves. After replacing both pieces, the stalling problem persisted. I put the smoke machine on it again, & the new EGR valve leaks vacuum in the same manner as the original. This is now the only vacuum leak on the car. On the EGR valve, there are openings in the under-side of the diaphram housing such that you can see the shaft that ties the diaphram to the valve itself. This is where the smoke comes out when the smoke machine is put to the car. In fact, the new EGR valve does it worse than the original.
Is the EGR valve designed this way intentionally, or did I get a defective EGR valve?
All the usual suspects have been addressed on this car in recent years. I just did a t-belt; cam timing set with dies & TDC gauge; belt tensioned in accordance with last TSB on the subject. All fluids & filters new, plugs, coils, & modules replaced two years ago, & O2 sensor replaced in recent years. After resolving the 1223 code with a replacement AFM, there are no codes present. The stalling occured with both AFM's.
Otherwise, the car runs great in all respects.
Thanks in advance for any input.
Servicing the injectors & replacing the dog bone engine mount got rid of the rough idle. Replacing the AFM got rid of the CE light at idle. A review of the service records indicated that the AFM had been tampered with in the past.
I'm now stuck with it stalling when I let off the throttle. If I wait until the car gets down to around 1500 RPM's before disengaging the clutch, it won't stall. However, if I let off the throttle & disengage the clutch at normal engine speeds, it will stall immediately. There is no sputtering or anything like that; it just dies as if the ignition switch was shut off. It will start right up again, but sometimes, I have to open the throttle a little on re-starting.
I put a smoke machine to it, & I saw that the idle controller & the EGR valve both leaked; not the gaskets or hoses, but the devices themselves. After replacing both pieces, the stalling problem persisted. I put the smoke machine on it again, & the new EGR valve leaks vacuum in the same manner as the original. This is now the only vacuum leak on the car. On the EGR valve, there are openings in the under-side of the diaphram housing such that you can see the shaft that ties the diaphram to the valve itself. This is where the smoke comes out when the smoke machine is put to the car. In fact, the new EGR valve does it worse than the original.
Is the EGR valve designed this way intentionally, or did I get a defective EGR valve?
All the usual suspects have been addressed on this car in recent years. I just did a t-belt; cam timing set with dies & TDC gauge; belt tensioned in accordance with last TSB on the subject. All fluids & filters new, plugs, coils, & modules replaced two years ago, & O2 sensor replaced in recent years. After resolving the 1223 code with a replacement AFM, there are no codes present. The stalling occured with both AFM's.
Otherwise, the car runs great in all respects.
Thanks in advance for any input.