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I know, just what we all wanted to see!
Actually, I am having some issues with the car's idle after doing some work with the intake plenum off and I thought I would document my troubleshooting here just in case someone else also has this issue. Yes, there are multiple similar threads of varying degrees, but none seem to match my issues exactly.
I will be following Greg Gordon's troubleshooting guide through this process as well after I get through some of the basics.
Vehicle: 1988 Alfa Spider Veloce 104k miles
Symptoms before/after intake removal:
-slightly higher than normal idle
-when starting (hot & cold), it will catch, then almost stall, then recover again.
What was replaced:
-motor mounts
-all vacuum lines with Greg Gordon's silicone hose kit (great stuff!)
-injector seals/short hoses
-all the rubber hoses/seals from the AFM to the TPS
First, I checked my idle o-ring; although it seems to be OK, I ordered a new one just to be on the safe side.
Pulled the AAV and noticed that it does not open very far at all [see photo below when cold]. I stuck it in the freezer for about 20 min, no change. I checked it hot and it does appear to close all the way. I was able to move the flap with a screw driver and it springs back.
I waited until the next morning, then bypassed the AAV completely and the car sprung to life, no stalling, but then the car started idling very erratic, revs going up and down, until i pinched the hose a little bit. I could control the idle by how much I pinched the hose.
Now, I know for a fact that my throttle linkage is a little out of whack, I will need to adjust those, but with them disconnected, the car still has a high idle. I don't believe that the linkage should be putting any tension on the throttle body, but please correct me if I'm wrong! I don't think those cheap little plastic pieces would last very long if that was the case.
I've only had the car for about 6 months and it looks like the PO has messed with the set screw on the TB as the rubber cover is missing, so I will get to that eventually.
[more to come, have to go to work now]
Actually, I am having some issues with the car's idle after doing some work with the intake plenum off and I thought I would document my troubleshooting here just in case someone else also has this issue. Yes, there are multiple similar threads of varying degrees, but none seem to match my issues exactly.
I will be following Greg Gordon's troubleshooting guide through this process as well after I get through some of the basics.
Vehicle: 1988 Alfa Spider Veloce 104k miles
Symptoms before/after intake removal:
-slightly higher than normal idle
-when starting (hot & cold), it will catch, then almost stall, then recover again.
What was replaced:
-motor mounts
-all vacuum lines with Greg Gordon's silicone hose kit (great stuff!)
-injector seals/short hoses
-all the rubber hoses/seals from the AFM to the TPS
First, I checked my idle o-ring; although it seems to be OK, I ordered a new one just to be on the safe side.
Pulled the AAV and noticed that it does not open very far at all [see photo below when cold]. I stuck it in the freezer for about 20 min, no change. I checked it hot and it does appear to close all the way. I was able to move the flap with a screw driver and it springs back.
I waited until the next morning, then bypassed the AAV completely and the car sprung to life, no stalling, but then the car started idling very erratic, revs going up and down, until i pinched the hose a little bit. I could control the idle by how much I pinched the hose.
Now, I know for a fact that my throttle linkage is a little out of whack, I will need to adjust those, but with them disconnected, the car still has a high idle. I don't believe that the linkage should be putting any tension on the throttle body, but please correct me if I'm wrong! I don't think those cheap little plastic pieces would last very long if that was the case.
I've only had the car for about 6 months and it looks like the PO has messed with the set screw on the TB as the rubber cover is missing, so I will get to that eventually.
[more to come, have to go to work now]
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