98 disco injectors have power but no pulse
#1
98 disco injectors have power but no pulse
I just had a new fuel pump installed in my 98 discovery, along with two ignition coils, new plugs and wires, and the fuel filter for good measure. Everything went in fine, but here's where things get weird.
Now the fuel injectors are getting power, but aren't grounding. The truck will run when it's sprayed with fuel, but it otherwise it just cranks. We've checked the inertia switch, the crank sensor, computer swap (which had some corrosion on the case, but it wasn't bad) and we're about to check the cam sensor. After this, we're running out of ideas. I think it might be a ground issue, but wouldnt know where to look. Any help would be appreciated!
Now the fuel injectors are getting power, but aren't grounding. The truck will run when it's sprayed with fuel, but it otherwise it just cranks. We've checked the inertia switch, the crank sensor, computer swap (which had some corrosion on the case, but it wasn't bad) and we're about to check the cam sensor. After this, we're running out of ideas. I think it might be a ground issue, but wouldnt know where to look. Any help would be appreciated!
#4
I wonder if they don't need the AS10 as well from the donor of the ECU. Mine wouldn't start without the AS10 from the donor, I tried to short cut it to see if my buddy Tim the Enchanter was correct. Started up after the donor AS10 was plugged in. AFAIK the two are factory code mated with the trucks VIN and can be mated at the dealer after a swap of one or the other. I dunno. Both Tim and SB didn't mate them and had no issues. By the way, good to see you here PT, more D1 action than you could shake a TC lever at. Spike should add you as a mod.......
Last edited by ihscouts; 03-30-2012 at 07:27 PM.
#5
I never told my ECU and 10AS they were adopted.
Are you getting a CEL light in key position II? If not perhaps the ECU and 10AS are feuding. Did you have the battery disconnected while swapping the pump? If you did and failed to depress the hood switch when you put the cable back on you probably armed the alarm.
Are you getting a CEL light in key position II? If not perhaps the ECU and 10AS are feuding. Did you have the battery disconnected while swapping the pump? If you did and failed to depress the hood switch when you put the cable back on you probably armed the alarm.
#6
#7
I only swapped the computer for about an hour, because it wouldn't crank at all, so I put the old one back in. I'm afraid that by doing so I armed the system but the key fob is still calibrated and working. In regards to having the battery disconnected while swapping the pump I'd have to ask my mechanic, I didn't do that myself. Right now the fuel pump has been bypassed at the inertia switch with a toggle, because the multi function relay was acting ...strange. Everything inside (lights, chimes in pos II, stereo) is working fine. Tomorrow I'm going to double check the grounds on the injectors and see if I missed something. Thanks everyone for the fast replies!
#8