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89dc240 · 02-18-2009, 08:25 PM

I wish I could say I replaced the o-rings, lol. I wanted to. I'm pretty sure they are ok. I replaced the fuel pressure regulator with a spare I had, based on being able to blow through the old one with no vacuum, and not being able to blow through the spare one. I also tested to make sure the injectors were working, by hooking three AA batteries end to end with a wire coming from each end(pos. and neg.), then tripping the injector manually. All the spares did not function. the original was good.

Anyhow, it seemed to be working fine after I replaced the fuel pressure regulator, drove it to work Monday, get back in after work and now the car is actually backfiring. I think I have an exhaust leak at the front of the cat,(similar symptoms to when I did before) from a quick fix weld job I did there like 6 months ago. And so I think the EGR might be affected by that. And maybe I'm just not getting enough fuel because there is too much exhaust, being pushed through the possibly, constantly open EGR Valve. Which has probably 242k on it.

I'm gonna take care of the exhaust leak, and then we'll see about "permanently fixing" the EGR.

*EDIT* I might be jumping the gun on the leak, and hoping that fixes the problem. The plug was black in #4 after I got home from work monday(all 4 were fine until then, the others are still good). I changed it out and the car was still running on only 3 cylinders. Now that I think about it, I could have damaged the o-ring(s) on the #4 injector. But I only drove about a mile or so and at low speed, so the plug still looks new/slightly brown. (I Know on a two stroke you check the plug after like a 1/4 mile pull when you're jetting it, so I figure the mile was enough to get a decent read on that plug) But I can't say. I still have some work to do.

02-18-2009, 08:25 PM	#4
89dc240 Zilvia Junkie Join Date: Nov 2006 Location: Just South of Philly Age: 41 Posts: 352 Trader Rating: (0)	I wish I could say I replaced the o-rings, lol. I wanted to. I'm pretty sure they are ok. I replaced the fuel pressure regulator with a spare I had, based on being able to blow through the old one with no vacuum, and not being able to blow through the spare one. I also tested to make sure the injectors were working, by hooking three AA batteries end to end with a wire coming from each end(pos. and neg.), then tripping the injector manually. All the spares did not function. the original was good. Anyhow, it seemed to be working fine after I replaced the fuel pressure regulator, drove it to work Monday, get back in after work and now the car is actually backfiring. I think I have an exhaust leak at the front of the cat,(similar symptoms to when I did before) from a quick fix weld job I did there like 6 months ago. And so I think the EGR might be affected by that. And maybe I'm just not getting enough fuel because there is too much exhaust, being pushed through the possibly, constantly open EGR Valve. Which has probably 242k on it. I'm gonna take care of the exhaust leak, and then we'll see about "permanently fixing" the EGR. EDIT I might be jumping the gun on the leak, and hoping that fixes the problem. The plug was black in #4 after I got home from work monday(all 4 were fine until then, the others are still good). I changed it out and the car was still running on only 3 cylinders. Now that I think about it, I could have damaged the o-ring(s) on the #4 injector. But I only drove about a mile or so and at low speed, so the plug still looks new/slightly brown. (I Know on a two stroke you check the plug after like a 1/4 mile pull when you're jetting it, so I figure the mile was enough to get a decent read on that plug) But I can't say. I still have some work to do.