So, I'm the guy that just finished rewiring and megasquirting my Eta (I was bored).
Before I rewired everything, I always had a high idle and a ticking sound coming from my exhaust. It also shook pretty bad under load above around 2,500 rpm (right when stuff starts to get fun!). This was part of the reason I decided to run a standalone. In the act of prodding around the "factory" harness, I discovered that one of the injector plugs had one of the leads hard shorted to the engine block ground post terminal. I thought, "cool, that might be why it's running weird."
So I get it to idle really nice and steady around 800 rpm, but there's still this bad ticking sound coming from the exhaust, and now it's dripping gas out the tailpipe! It's 100% not water, it's gas. Shit. It's a dead misfire.
So I get out the test light and sure enough, I'm getting a nice fat white inch-long spark on all 6 plugs, tested at the boot. So, it's not the wires, cap, rotor, or coil. It's not the injectors because I'm running some Lucas injectors from a junkyard M62 (191cc) that I cleaned and tested. Shit. Only leaves compression.
So I get out the compression tester and test it cold. Throttle open, all the plugs out, by the book. Here's what I found:
Plug 3 had oil on it and plug 4 had some crusty white stuff that looked like mold on the prong electrode. All of them were pretty black. Sewed everything back up, torqued them all down, spun around the block, and it's still ticking and shakes under hard throttle above 2,500 rpm. It also does burn oil.
So the real question:
What's my next step in diagnosis here? The head gasket is 4000 miles old and it's never gotten hot. Timing belt is new, installed by someone who knew what they were doing (not me). When the head was off, it got tanked (but not sure if the valves got lapped or not). Cylinder 1 did wiggle a little, but it didn't seem like a concern. Head's not cracked. No coolant in the oil, no exhaust smoke. Just gas coming out the tailpipe.
What do I do???
Edit: I also listened to the change when I pulled each plug wire, and this agrees with the compression test. Disconnecting 1 and 2 didn't do much, but 4, 5, and 6 were drastic.
Before I rewired everything, I always had a high idle and a ticking sound coming from my exhaust. It also shook pretty bad under load above around 2,500 rpm (right when stuff starts to get fun!). This was part of the reason I decided to run a standalone. In the act of prodding around the "factory" harness, I discovered that one of the injector plugs had one of the leads hard shorted to the engine block ground post terminal. I thought, "cool, that might be why it's running weird."
So I get it to idle really nice and steady around 800 rpm, but there's still this bad ticking sound coming from the exhaust, and now it's dripping gas out the tailpipe! It's 100% not water, it's gas. Shit. It's a dead misfire.
So I get out the test light and sure enough, I'm getting a nice fat white inch-long spark on all 6 plugs, tested at the boot. So, it's not the wires, cap, rotor, or coil. It's not the injectors because I'm running some Lucas injectors from a junkyard M62 (191cc) that I cleaned and tested. Shit. Only leaves compression.
So I get out the compression tester and test it cold. Throttle open, all the plugs out, by the book. Here's what I found:
- 150 psi (tested it twice)
- 160 psi
- 170 psi
- 190 psi
- 180 psi
- 195 psi
Plug 3 had oil on it and plug 4 had some crusty white stuff that looked like mold on the prong electrode. All of them were pretty black. Sewed everything back up, torqued them all down, spun around the block, and it's still ticking and shakes under hard throttle above 2,500 rpm. It also does burn oil.
So the real question:
What's my next step in diagnosis here? The head gasket is 4000 miles old and it's never gotten hot. Timing belt is new, installed by someone who knew what they were doing (not me). When the head was off, it got tanked (but not sure if the valves got lapped or not). Cylinder 1 did wiggle a little, but it didn't seem like a concern. Head's not cracked. No coolant in the oil, no exhaust smoke. Just gas coming out the tailpipe.
What do I do???
Edit: I also listened to the change when I pulled each plug wire, and this agrees with the compression test. Disconnecting 1 and 2 didn't do much, but 4, 5, and 6 were drastic.
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