eppoh Posted May 12, 2011 Share Posted May 12, 2011 my 97 Lego has never made good fuel mileage since I have had it. It gets about 25 on the highway. My 98 with the same mileage got 28-29, before it was totalled. Yesterday, with the heads pulled, I can see a fair amount of carbon build up on the pistons and chambers. By fair amount, I mean more than any other I have ever seen on a 100K plus mile 2.2 Never had a check engine lights. compressions were always good 190 or better, kept in tune with Denso plugs, wires etc... All the cylinders look the same, so I am wondering if fuel pressure regulator could be the cause, or maybe egr. Anyone have a good idea? Link to comment Share on other sites More sharing options...
Ricearu Posted May 12, 2011 Share Posted May 12, 2011 my 90 leggy with 2.2 gets about 25. 26 on a good day. bad FPR would probobly make your mileage more like 17-18. more likely that a few mpgs could be attributed to sensors fatiguing, like lazy O2 sensor or dirty maf, or even a "dead" spot in the tps at cruising position (my gl did that). Link to comment Share on other sites More sharing options...
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