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tune up-read your plugs and then check your timing. use timing light and double check with scan tool-most 91 305's were high outputs which
requires higher octane than regular (fuel grade revelatnt to compression ratio and altitude) you may want to check fuel pressure could be a clogged filter or bad pump.
Not to be rude. But if you dont know what your doing, Don't **** around with your engine timing. It is very crucial that this is done properly. Messing up your engine timing can cause your pistons to possibly drive into your sparkplugs, causing engine failure, and possibly a blown motor.
Fuel pressure? Do you hear the fuel pump running? Read the codes to see if ECM is still alive. Do you have spark at the plugs? Remember all motors need 3 things to run air, fuel, and fire at the right time.
no. if it is a tbi then you will need to set initial timing at 6 degrees before tdc and if it is a tpi then it needs to be 10 but i like it more on the 8 or less side. but by the book it is 10 degrees before tdc. also if you have the tpi there is the brown wire that needs to be un plugged (spoot connector) up at the firewall in the main harness on the pasanger side while setting timing. it stops the computer from advancing the timing so it can be set correctly.
please ask any more question you have i will be glad to help. i own 4 iroc-z28
Try 0 degrees. It should state it on the radiator cover, but mine didn't. I tried 10 advance and it started real hard. I think you need to disconnect the single wire terminal near the distributor/coil that sticks out of your harness wrap before you set timing and reconnect it afterwards. That's what I recall from my TPI car and this TBI car seems to have the same electronics. Good luck.
Duggeroo
tuned port injection yes
Engine oil leak!!
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