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86 GT needs help
Hi all,
Just picked up an 86GT 2.8 automatic. The price was right because a couple of years ago the owner shut it off to go into the store and when he tried to start it again, no dice. Since then it was worked on and left to sit for most of two years with no success in getting it running right. So, I think that this will be a good vehicle to learn about fuel injection and ECM's and such. Before I received the car they had replaced the ignition module, the pickup coil, the ECM and had the injectors serviced. Some time during all of that the fuel pump gave out. So when I got it, I changed the fuel pump and got the fuel sender working again. Then tried starting the car and all it would do is fire/misfire and would remain running if the accelerator was held about 1/4 throttle. But is was missing something terrible. Since the ignition module and pickup coil was replaced recently, I only installed another new ignition module and tested the pickup coil with an ohm meter. It checked good according to the haynes manual. So a new cap, rotor, wires, plugs and ignition coil were installed also. Result? Now the engine would not fire at all! I traced this back to the rotor of all things... The new one and old one look identical but putting the old one back in at least got the engine to fire a little... In the mean time, the injectors were sent in to be cleaned and tuned up again since the fuel had some contamination in it and I could not be sure it did not get to them. I broke down and installed a new pickup coil and now the car seems to run better but not drivable yet. Only able to get up to thirty miles an hour! For some reason, cylinders 1 and 3 are not firing. 2,4,5 and 6 all make the engine run rougher when the plug wire is pulled but pulling 1 and or 3 does nothing. After driving the car from its previous owners house to my house I finally got the ECM to store a code 33. It is the only code we have got so far. Is there any simple way to test the MAP before trying a new one? also is there any condition that would cause a false code 33? Can the O2 senser cause problems and not get a code? I still suspect there is something wrong with the ignition but I am running out of ideas. Oh, I forgot to mention that the EGR tube was cracked at the plenum mount and was welded back together. It seems to be holding ok. When we checked the vacuum it was around 15inches of merc. at idle at approx 1100 feet above sea level. does that seem ok? Next item to check is compression... Thanks for any and all suggestions
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cptsnoopy
:-)
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