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1997 Chevy Blazer check engine light is on but no fault code detected by scan tool?
Johnson9195
Hi, I just wanted to add more information on this problem. The truck will not start, and the check engine light is on. I tried to use a scan tool, and it did not find any fault codes, but the light is still on. This problem cane after I changed the MAF, MAP, TPS, EGR and the fuel pump. I have reinstalled the old components, except the fuel pump. I checked to see if I am getting spark and fuel pressure. The spark seems weak, and I have no fuel pressure. I read in the manual the the oil pressure switch can cause a fault that shuts off the fuel pump, but not sure how to verify that. I checked the fuel pump relay and it appears to be OK, and there I think there is power to the relay, since there are 3 relays side by side, I don't know which on is for the fuel pump. Any ideas would be appreciated. Thanks. I have tracked down one problem to the fuel pump, no I lose ignition power after a second or two. Any ideas? Thanks.
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∙ 17y ago
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