Vetteman9368

i can use the jumper and get the pump to work (new pump), but other wise nothing. Can't find a fuse for it, i understand it gets a signal from the ECU. I have replaced the main relays on the left fenderwell, no help. Is there if fuse or fuseable link that would control the ECU, and just where the hell is the ECU??????

Smog Fighter

Is your air flow meter plugged in? the fuel pump relay is controlled by it.



Raul

Vetteman9368

yup its plugged in

j9fd3s

ah wait does the tach work?



mike

Vetteman9368

seems to when trying to crank the engine, but 1K seem a lil optimistic when cranking

j9fd3s

hmm yeah the needle should bounce. the tach and ecu are driven off the trailing ignition, so no trailing ignition = no tach = no rpm signal to ecu = no fuel pump



mike

Vetteman9368

so would this lead you to think the ECU was bad?

j9fd3s

i'm thinking about the trailing ignitor. its very very rare to see a bad gsl-se ecu



mike

Smog Fighter

He could use a timing light on the trailing coil wire to see if the trailing

coil is firing.......

gearbanger

did you disconect your battery when installing your new pump? If not you may have shorted something. I don't know about gsl-se's but my 80 has a fuse for the engine it kills the fuel pump and ignition check to see if you have one.