allen pardon
Member
ok guys, im new here so take it easy on me lol. 3 years ago i bought a 99 fld 120 with a 98 n14 celcet plus in it over the first 2 1/2 years the truck ran fine but the ecm had 2 million miles on it and the person i bought it from did not know how many miles was on the first rebuild. i was starting to get alot of oil and water leaks on the engine so i had it rebuilt on my terms before it went on me. i pretty much done a major over haul including the cam without pulling the block. the truck was still running fine when i took to the shop. the day i picked it up from the shop, i started having back fire issues, 10 to 15 times a day, i took it back to the guy that done the rebuild and he changed the cam position sensor and that did not fix it so he sent me a bill for 200$. im not here to bash the guy but i basically told him what to do with that. well any way i started changing parts and have been unsuccessful so far but i do have an issue that i found and maybe one of you might can help.
i have my own diagnostic laptop and was driving down the road and watching the parameters and noticed that my manifold boost pressue was staying on 6 inh20 but my mechanical boost gauge would go from 0 to 40 depending on the load. i replaced the manifold sensor and no changes on ecm, it just stays at 6. i checked the continuity of all 3 wires on the harness and all tested fine, i checked the voltage and 5v is what its supposed to be and was so my question is, could my ecm be bad or going bad? any help would be greatly appreciated
i have my own diagnostic laptop and was driving down the road and watching the parameters and noticed that my manifold boost pressue was staying on 6 inh20 but my mechanical boost gauge would go from 0 to 40 depending on the load. i replaced the manifold sensor and no changes on ecm, it just stays at 6. i checked the continuity of all 3 wires on the harness and all tested fine, i checked the voltage and 5v is what its supposed to be and was so my question is, could my ecm be bad or going bad? any help would be greatly appreciated