Did fuel injector cleaner cause problem? - ZR-1 Net Registry Forums

Lawdawg · 03-01-2007

My 8500 mile Z had been running outstanding until recently.
While in the process of buying fuel at a local gas station I noticed a bottle of fuel injector cleaner on the shelf and thought to myself "You know, my Z has sat around quite a bit for many years". "Why don't I dump one of these bottles in to clean those injectors out".
About half way through the tank later that week, I noticed that after firing the car up it wanted to bogg or stumble at low rpm. If the RPM's drop down to low in high gear, same thing. Once I give it some juice, It goes away. The problem comes and goes and does not seem to affect the cars performance. The car still averaged 23MPG on a trip to the Keys last week. I also have had NO SES warning light.
Now it appears I have another issue. I'm hearing the dreaded rattle rattle from under the car in first gear along with the hum at low RPM when taking off. When the engine comes to a stop, the entire symphony ends to the rattling sound like that of a diesel motor.
Could these issues be connected? Am I losing my mind? (YES!) After searching other threads, it sounds like a couple of possibilities. Bad injectors, coils, ECM, or DM flywheel (at 8500 miles I really didn't expect flywheel issues)
Not being mechanical if you catch my drift, I checked the only thing I could figure out how to, the MAP sensor plug. Surprise! My life just isn't that easy, it was plugged in tight.
Is it possible that this entire sequence of events started with a little bottle of fuel injector cleaner, or am I bringing Lee Harvey Oswald back from the dead to take the rap again?
Do you think that one of my local Florida Chevy dealers will be able to diagnose the problem, or am I gonna have to drive to Georgia to see Arron Scott at SG corvettes?
Lastly will the car be safe to drive until the issue is addressed since there have been no warning lights?
Thanks in advance, Lawdawg.

03-01-2007	#1
Lawdawg Join Date: Jan 2007 Location: WPB Florida Posts: 10	Did fuel injector cleaner cause problem? My 8500 mile Z had been running outstanding until recently. While in the process of buying fuel at a local gas station I noticed a bottle of fuel injector cleaner on the shelf and thought to myself "You know, my Z has sat around quite a bit for many years". "Why don't I dump one of these bottles in to clean those injectors out". About half way through the tank later that week, I noticed that after firing the car up it wanted to bogg or stumble at low rpm. If the RPM's drop down to low in high gear, same thing. Once I give it some juice, It goes away. The problem comes and goes and does not seem to affect the cars performance. The car still averaged 23MPG on a trip to the Keys last week. I also have had NO SES warning light. Now it appears I have another issue. I'm hearing the dreaded rattle rattle from under the car in first gear along with the hum at low RPM when taking off. When the engine comes to a stop, the entire symphony ends to the rattling sound like that of a diesel motor. Could these issues be connected? Am I losing my mind? (YES!) After searching other threads, it sounds like a couple of possibilities. Bad injectors, coils, ECM, or DM flywheel (at 8500 miles I really didn't expect flywheel issues) Not being mechanical if you catch my drift, I checked the only thing I could figure out how to, the MAP sensor plug. Surprise! My life just isn't that easy, it was plugged in tight. Is it possible that this entire sequence of events started with a little bottle of fuel injector cleaner, or am I bringing Lee Harvey Oswald back from the dead to take the rap again? Do you think that one of my local Florida Chevy dealers will be able to diagnose the problem, or am I gonna have to drive to Georgia to see Arron Scott at SG corvettes? Lastly will the car be safe to drive until the issue is addressed since there have been no warning lights? Thanks in advance, Lawdawg.