kimmerlykg Posted September 4, 2015 Share Posted September 4, 2015 So I'm looking at buying a 94 Loyale. It's a 97k 5speed 4wd wagon. After driving the car, I determined it runs like garbage and maybe has something to do with the check engine light on. I was reading instead of using a traditional code reader, you connect or disconnect connectors by the booster and watch an led light on/near the ECM. ...really? My last three were carbed - an 85 and two 87s. Any help would be great. Guy said he'll take $750 but I'm not willing to take a gamble. Link to comment Share on other sites More sharing options...
jono Posted September 4, 2015 Share Posted September 4, 2015 there is a procedure to follow and connect the jumpers to read the codes off the LED on the ECU strapped to underside of steering column. Ask if you can do a comp test on cylinders ... may just need tune up stuff like filters plugs leads cap and rotor etc two green plastic connectors in loom just near the ECU in a few models, think you connect once warm, running etc - I forget. Only time I got a LED read it was accurate and fixed, never a trouble again ! Link to comment Share on other sites More sharing options...
DaveT Posted September 4, 2015 Share Posted September 4, 2015 For major constant trouble codes, you can just look at the LED. It will sequence through them while the engine idles. The harness connectors do 2 things. 1 set is to go into dealer diagnostic mode which also displays intermittent codes that were stored in memory. The other set is used to clear the memory. There is a sequence of steps in addition to activate these modes. I don't have my fsm handy, and I don't have them memorized. Link to comment Share on other sites More sharing options...
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now