1987 IROC, Ran out of gas,put gas in, now service engine light on

I would change all the fluids and either try dry gas or i would recommend that the gas tank be thoroughly drained and new gas put in the tank.If you have a hard time getting started try to use starter fluid in carburetor or if you have none just use gas. If the vehicle is equipped with fuel injectors locate air filter and follow air duct to engine that is where starter fluid or gasoline will have to be pored to prime the injectors.if it don't start the engine should be tuned up with a major tune up replace all filters ect even if it starts without tune up i would tune it up asap!

If the M.A.F. sensor is disconnected it can't help the driveability of the vehicle in question. Do you get a service engine soon light with a code to this effect? I would change it and hook it up and see what happens.

So it ran fine until you gassed it up? I would take the fuel filter off and drain it and see what you have, it may be a bad batch of gas, if so contact the station.

remove dog house locate test port and install guage should be 45-60 psi

GasparMacari is 100% on target. I had the same problem with my IROC. Seems that the sulphur in the gas errodes the contacts on the gas gauge sensor in the fuel tank. I know of people that have tried gasoline additives to clean the corrosion but I would give it a 50/50 chance of working. You gotta drop the tank to get at the fuel pump/sensor assembly. You are looking at some big bucks and it is NOT a do-it-yourself project. One spark and BOOM no more Camaro... or YOU... I'd suggest setting or re-setting your odometer trip indicator every time you fill up. Keep track of the miles driven .vs your MPG and you can figure out when it is time to fill 'er up again. That's what I did until I traded it off.

disconnect possitive to battery....then reconnect

its entirely possible. I have wasted more of my time clearing false EVAP (evaporation emissions) codes from people not tightening down their gas caps than i care to mention. not your problem i know, but bizarre things cause those lights to set. your best bet is to get it checked (aftermarket parts places tend to offer free scans) and if it is fuel related, have it cleared and keep an eye on it for a while.

When your car runs out of gas things like this happen it should always have reserved gas at least 2 liters...

i would say that you have a bad fuel pump or if you have a carb on it the float inside the carb is stuck check these and i'm sure you will find it's one of these.

Don't know if it'll help, but, my 2002 Sportage's check engine light came on when I put gas in it and stayed on until I ran out all of that tank full. I asked at that station if anything had been added to their fuel, and after a lot of hee hawing, they admitted they were adding ethanol! So, watch where you buy gas!!