Engine Ticking - ZR-1 Net Registry Forums

Dmod81 · 07-27-2015

Just a little update:

I ran through the fuel pressure test procedure and was getting almost instant leakdown, so I replaced both pumps. Now I get 52 psi when the pumps are running, which drops to about 43 when the pumps stop and holds there with very slight leakdown. Pressure at idle is about 42. I also replaced the fuel filter. Rough running/miss at idle still there.

Finally I replaced the injectors. There was some crud in the rails that I cleaned out. I also checked my plug wire routing/reseated the wires, replaced plugs, O2s, and checked all other connections/vacuum lines. All seemed good. Rough/miss at idle is still there, but it might be very slightly better. However, the stumble with throttle after coasting is MUCH better. Almost non-existent.

As a kicker- I now have a very large screw in a rear tire. Must be a gift for driving the car only 40 miles over the last 4 months trying to fix it. I think something is trying to tell me it's time to throw in the towel.

07-27-2015	#23
Dmod81 Join Date: Mar 2010 Location: Colorado Springs CO Posts: 76	Re: Engine Ticking Just a little update: I ran through the fuel pressure test procedure and was getting almost instant leakdown, so I replaced both pumps. Now I get 52 psi when the pumps are running, which drops to about 43 when the pumps stop and holds there with very slight leakdown. Pressure at idle is about 42. I also replaced the fuel filter. Rough running/miss at idle still there. Finally I replaced the injectors. There was some crud in the rails that I cleaned out. I also checked my plug wire routing/reseated the wires, replaced plugs, O2s, and checked all other connections/vacuum lines. All seemed good. Rough/miss at idle is still there, but it might be very slightly better. However, the stumble with throttle after coasting is MUCH better. Almost non-existent. As a kicker- I now have a very large screw in a rear tire. Must be a gift for driving the car only 40 miles over the last 4 months trying to fix it. I think something is trying to tell me it's time to throw in the towel.