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AleroB888 · 05-28-2008, 02:43 AM

I got a Walbro 255 LPH fuel pump installed a couple of days ago, gave it a day for the computer to settle things in, and did a scan. It seemed to make the Envoy injectors work even better, and I should have left them in to see if the pump change would gain anything at the track.

However, I was anxious to try out some other injectors I found in a salvage yard, so I changed them out the next day.

5) OEM # 0280155737
1996 Buick Riv SC, M90, GTP, etc. / 36 lb/hr
6) OEM # 0280150934
1992 Buick SC, M62, etc. / 28 lb/hr

5) 1996 Buick Riv M90 (4-hole nozzle)
I have only had these in a day and a half, and it's been raining most of that time, so the testing is far from done. No problems with drivability have shown up yet, but it's too soon to judge the WOT performance. There are way more random misfires showing up on the scans than with the Envoy injectors, not that you actually feel it when driving. No codes thrown. (note: I reset IFR in the PCM)
With the Walbro and these in now, we are running much richer at WOT....time to check the plugs

6) 1992 Buick M62 (4-hole nozzle)
I'm just including these as a curiosity, I picked them up not knowing what their flow rate was. The only info I found was in some forums stating they were 28 lb/hr. They would fit, though, if you wanted to use them, and there are some aftermarket units in the same configuration.

05-28-2008, 02:43 AM	#4
AleroB888 GLS member Join Date: Nov 2007 Location: Fort Knox area, KY Posts: 2,120	I got a Walbro 255 LPH fuel pump installed a couple of days ago, gave it a day for the computer to settle things in, and did a scan. It seemed to make the Envoy injectors work even better, and I should have left them in to see if the pump change would gain anything at the track. However, I was anxious to try out some other injectors I found in a salvage yard, so I changed them out the next day. 5) OEM # 0280155737 1996 Buick Riv SC, M90, GTP, etc. / 36 lb/hr 6) OEM # 0280150934 1992 Buick SC, M62, etc. / 28 lb/hr 5) 1996 Buick Riv M90 (4-hole nozzle) I have only had these in a day and a half, and it's been raining most of that time, so the testing is far from done. No problems with drivability have shown up yet, but it's too soon to judge the WOT performance. There are way more random misfires showing up on the scans than with the Envoy injectors, not that you actually feel it when driving. No codes thrown. (note: I reset IFR in the PCM) With the Walbro and these in now, we are running much richer at WOT....time to check the plugs 6) 1992 Buick M62 (4-hole nozzle) I'm just including these as a curiosity, I picked them up not knowing what their flow rate was. The only info I found was in some forums stating they were 28 lb/hr. They would fit, though, if you wanted to use them, and there are some aftermarket units in the same configuration. Last edited by AleroB888 : 11-28-2008 at 01:04 AM.