20 Most Recent 1988 Pontiac Fiero Questions & Answers

check vacuum hoses for leaks.

How much fuel pressure?

Fuel pump electric? Check the oil pressure sensor/switch

Craig, I believe oil sender is screwed into the block just above the oil filter. Check the attached links,instruction and guides, Good luck. "I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info." https://groups.google.com/forum/#!topic/alt.autos.fiero/SXVWtGjdmcg Online Service Guide Main Page http://www.fierosails.com/OilSensor.html Better Oil Pressure Sending Unit

Go to Pennock's Fiero Forum and ask this question there. They will help you. Ask under Tech.

I would simply put some Seafoam in there and keep on trucking. You can run the fuel pump via the ALDI port under the middle armrest, but fresh gas is probably enough to solve the problem at this point. Sure it will be hard to drive for a while, but a whole tank of gas in a Fiero is only good for about two hundred miles at best. A hundred miles of quiet streets should get you to the next tank, after that it should keep getting easier.

Cold start fuel injector may not be working.

Front of center armrest. Remove plastic cover where the lighter is. Remember this is OBD I, not good for much.

Standing behind the car facing forward #1 is on right side of engine. #2 is on other side of engine (the front). #3 is the middle plug on your side. #4 middle of the other side. #5 left on your side. #6 other side. Firing order: 1,2,3,4,5,6.

ECM fuse 25 amp, under dash

You might also want to check your fuel filter and your fuel pump for proper operation before going on so that you dont spend more for uneccessary repairs.

Apparently the job at hand requires expert guidance especially complimenting reinstallments of newer parts capable of allowing vehicle to function once as before. 1. Inspect the vehicles auto user guide to attain engine repair aggreements normally comprises manufacturers warantee also guarantee recommendations to repair also attain proper functionality of vehicle. 2. Initially communicating with vehicles manufacturer maybe resourceful especially since vehicle maybe due for overhauls. 3. Scheduling a technical resolvement of vehicle is most appropiate method to repairs. 4. During business hours also Mondays through Fridays, engineers within locality areas especially convesant of vehicles brand maybe consulted especially to collect and evaluate also to replace malfunctioning parts and allow vehicle to attain functioning condition.

1) Running fuel pump to remove water from tank will likely not empty it all, but it might help. Will still be some liquid in bottom of tank.

2) More than likely, the gas has gummed up and is no good, While your draining of the tank will help, may still need to change the fuel filter and clean the injectors. The ability to keep engine running while pouring into the intake is a good sign, but mayfind that more parts need to be cleaned and replaced prior to solving the problem.

rebuild the cylinder of replace

fuel pump relay located in red.

I have seen this on old cars, my suspicion is that the seals on the valves are a bit worn. This allows some oil to get through during start up. Since it quits smoking, I would not be overly concerned. However, since it burns a quart every 1-2K miles, I am curious what the compression is. My Fiero does the same thing (occasional puff of smoke on start up) but does not need oil between 3,000 mile chages. It is a 2.5 liter. Here is nice tip: check compression on all cylinders, then recheck it adding a teaspoon of 2 cycle oil to the cylinders (one cylinder at a time). Some have said to use conventional oil for this, due to higher viscosity, but I always thought it might foul the spark plugs. If the compression goes up, it is ring wear, if not it is leaking through the valves.

I had the same problem, maybe 25MPH top speed and difficult to start. Changed out the old gas, installed fresh high octane-problem was worse.The ignition system was faulty. Pull a High voltage wire and you should see a bright blue spark and hear a crackling noise. If you see a weak yellow spark, you found your problem.Could be a bad/weak ignition module-rather famous in a Fiero due to heat exposure. Bad pickup coil in the distributor. I replaced the entire (rusty) distributor with a new/rebuilt unit a long with a new Ignition module. Solved the problem!