Guest rclinton Posted November 15, 2005 Report Posted November 15, 2005 I'm a newby to the site, need expert help diagnosing the problem. At highway speed engine starts running rough, then finally quits or will no longer pull. I can pull over and let the engine idle or restart in a minute or so and can go again for a few miles. Replaced fuel filter and checked fuel pressure and only get 30PSI, books say 35-55 is normal . Codes indicated low fuel pressure and # 3 & 4 cylinders miss firing. Fuel pump? Fuel pressure regulator? Coil / igintion system? 197K miles, have had fuel pump replaced once before, and ran it a little low last evening before refueling. Need help before we start throwing lots of parts at this. Thanks, Quote
Guest j_mchattie Posted November 15, 2005 Report Posted November 15, 2005 Maybe you have blocked injectors Quote
Ivor_E_Tower Posted November 15, 2005 Report Posted November 15, 2005 Could be dirt or partial blockage of the fuel line with debris in the fuel tank. Mis-firing - when were the ignition leads last changed? Quote
Guest rclinton Posted November 18, 2005 Report Posted November 18, 2005 Fixed it with a fuel pump and MAF sensor and several $$!! Thanks for the help. R Clinton Quote
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