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flyin 5.8 · 08-12-2002, 06:27 PM

We're going to the NASCAR race at MIS this weekend. The motorhome is not well. It's a 1989 Econoline 350 with a 460 EFI engine (EEC-IV). We pulled the codes today and got 41 KOEO,C and 41,87 KOER.

41,C is O2 sensor signal
41,R is lean fuel mixture
87,R is fuel pump circuit

It just got a basic tune-up, and the forward fuel pump was replaced (one in tank & one on frame rail). From what I've seen the in tank pump is a low pressure unit and the forward pump is a high pressure unit.

Any ideas??

Any & All help is appreciated.

08-12-2002, 06:27 PM	#1
flyin 5.8 Registered Member Join Date: Apr 2002 Location: Holland, Michigan Posts: 73	Need Help!! 460efi. Codes 41,87 We're going to the NASCAR race at MIS this weekend. The motorhome is not well. It's a 1989 Econoline 350 with a 460 EFI engine (EEC-IV). We pulled the codes today and got 41 KOEO,C and 41,87 KOER. 41,C is O2 sensor signal 41,R is lean fuel mixture 87,R is fuel pump circuit It just got a basic tune-up, and the forward fuel pump was replaced (one in tank & one on frame rail). From what I've seen the in tank pump is a low pressure unit and the forward pump is a high pressure unit. Any ideas?? Any & All help is appreciated.