Quote:
Originally Posted by joemccaleb
timing is retarted. distrubutor and injectors have different plugs from 89 to 88. reason for change. diagnostic port shows codes 24 and 51 intake air temp and a/c. timing seems to be advancing or retarted wit the jumper in place.
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Well, if I remember correctly, you can't properly set your ignition timing with DTC's present. You will need to fix your CEL codes before proceeding any further, as your base ignition timing will not be set properly until you do.
When setting base ignition timing, it can't advance or retard- it is whatever you set it. When you remove the jumper from the diagnostic box, it should stay close to the base timing of 10? BTDC, but it may retard or advance by a degree or so.
89 is a very tricky year as far as engine / chassis wiring is concerned; there are several variations, and they aren't necessarily 100% compatible with earlier or later set ups. Your '88 should have used yellow fuel injectors; since you said that these injectors didn't plug in, I'm assuming you have green fuel injectors installed? The yellow top injectors are low impedance, green top are high impedance. Low impedance injectors require a resistor pack to function properly (your '88 had one, your '89 probably doesn't), high impedance do not.
Also worth noting, yellow top injectors flow 295cc, green injectors flow 315cc
So that I (and anyone else reading this) understand your swap correctly, you have an '88 7MGE with an '89 distributor, '89 fuel injectors, '89 wiring harness, '89 ECU, and all the '89 electronics on the fenders (ignition coil, AFM, etc)?