Quote:
Originally Posted by contranication
I had a ka with bolt-ons. I installed a walbro and 2 weeks later I had fouled plugs and the whole time I lost like 2miles to the gallon just from driving back and forth to work.
Never got to check if it was the FPR, so I can't comment there but I increased by plug gap by .002" or .02" which ever it is and it gave a long enough spark to keep me from running rich.
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Well .002 and .02 are a pretty big difference. And chances are you have a faulty FPR. Not sure if it's the fuel pump that causes them to go bad but I've run a Walbro 255 on both my 240s now and neither had a problem with the FPR failing. So it could be just a crapshoot whether it fails or not. I was running a little rich after install, but not enough to cause problems. I upgraded the CAT and passed smog with flying colors, both times.
You have to remember that these cars are anywhere from 10 to 16 years old! Parts break.... it happens. I would install the walbro, then check your mixture if it's running extremely rich then get a new FPR. KAs run a little rich in stock form anyways.
Just check the fuel pressure BEFORE and AFTER install. Your stock readings should be 34 psi(hose connected), and 43 (hose disconnected). If it changes too much after the install then replace it.