Help! 1st Time Removing Plenum....now rough idle - ZR-1 Net Registry Forums

2ljd · 09-10-2016

Thanks for the checklist. While some of the items would be nice to do, they'll have to wait a bit.

The purpose of my plenum pull was to change out the injectors and trace a secondary vacuum leak. While I was in there, I changed out the plugs, wires and coils for good measure. I traced the vacuum leak to the solenoid and replaced it. The secondaries worked perfectly after that.

Everything went back together smoothly enough, but upon startup, it felt as though it was running on only half the cylinders. That was last night...tonight, I pulled the plugs to inspect them and only one of them looked slightly discolored (probably didn't run them long enough to affect them).

Then I started the engine again and began to pull each plug wire one by one to see if the idle changed at all. Well, it appears that cylinders 2, 5 and 8 didn't change the idle when I pulled the wires. I know they were all getting spark because it was jumping to the heads.

So I need to pull the plenum and check each injector for resistance as well as for spray, and make sure I pushed the connectors on all the way. If they check out, I'm dreading having to trace back from there...

09-10-2016	#24
2ljd Join Date: May 2016 Location: Hawaii Posts: 124	Re: Help! 1st Time Removing Plenum....now rough idle Thanks for the checklist. While some of the items would be nice to do, they'll have to wait a bit. The purpose of my plenum pull was to change out the injectors and trace a secondary vacuum leak. While I was in there, I changed out the plugs, wires and coils for good measure. I traced the vacuum leak to the solenoid and replaced it. The secondaries worked perfectly after that. Everything went back together smoothly enough, but upon startup, it felt as though it was running on only half the cylinders. That was last night...tonight, I pulled the plugs to inspect them and only one of them looked slightly discolored (probably didn't run them long enough to affect them). Then I started the engine again and began to pull each plug wire one by one to see if the idle changed at all. Well, it appears that cylinders 2, 5 and 8 didn't change the idle when I pulled the wires. I know they were all getting spark because it was jumping to the heads. So I need to pull the plenum and check each injector for resistance as well as for spray, and make sure I pushed the connectors on all the way. If they check out, I'm dreading having to trace back from there...