Help please 90Q won't start

[dosomthangs]

I brought a 90 Q45 from the auction without a key and the air bag deployed I took out the ignition and got it started sounds great by the way, i then got a key mad from a locksmith and it worked great I replaced the airbag and it never started again can you help please I changed the fuel pump I'm getting presure and spark and check all the fuses everything is OK I even disconected the air bag and tested it as well but it won't start just cranks but won't turn over what can I do I was told that it could be the computer not reconizing the key is there a way to reset the computer if that the problem or do you have any Ideas......

[DAEDALUS]

What was the fuel pressure? I wouldn't be surprised if the airbag deployment tripped some kind of fuel pump shut off safety switch. How did you check that you're getting spark? Are you certain the injectors are firing too? You can loosen and spin the crank angle sensor to hear the injectors fire without the car running. To reset the computer, disconnect the battery for 24 hours, then reconnect.

[dosomthangs]

not to sure about the fuel presure but it was comming out faster then the old one when I pulled the gas line it comes on for about 3 to 4 sec then stops where would the fuel pump safty switch be? where would the crank angle sensor be so that I can test the injectors also the fuel injector fuse blew out but I replaced but still no startdo I need to reset that as well ?

[DAEDALUS]

The injector fuse blew? I'd follow up on that first. The CAS is on the front of the drivers-side head. Don't make any permanent changes to the timing. You can also buy a cheap noid light from Pep Boys or somewhere, and just plug it into the injector harness, then see if it lights while you crank the engine. Check the ones you can reach. You can also check the resistance of each injector from the harness. If you don't have a factory manual, you probably want to start looking for one.

[dosomthangs]

thanks I will get on that right away do you where I can get a factory manual for a good price I'm down to my last coins

[Chally]

Can you find a dealer with a consult? It is a machine they plug into the computer harness & it will make finding a problem a lot easier.

If you had a fuse blow, there may be a problem in the wiring.

Has the vehicle got any sign of being repaired around the front area? (crash repairs, that is)

[dosomthangs]

yes It had repairs in front the car was crashed but they did a good job in welding the front back but I noticed that the front top air bag sensor was missing and also the horn hook up wires has been cut so I think I need to re wire the harness I believe that the previous owner ran out of money and they just ran the car threw the auction I will check in the meantime on a consult at the local dealers

[911/Q45]

If I read your first post correctly, the car ran with the ignition bypassed, ran with the new key but no airbag, then wouldn't run with the new airbag installed and continued not to run even when the airbag was removed again. I'm with Daedalus on some sort of inhibit for safety after airbag deployment. Try removing the airbag and disconnecting the battery for a while to reset the computer. I'm not sure how tied in the airbag system is to engine operation, but cut wires and missing sensors can't be good.

[maxnix]

Try removing the airbag and disconnecting the battery for a while to reset the computer.

Please disconnect the battery first, then disconnect the airbag.