1988 Pontiac Fiero - Answered Questions & Fixed issues

How much fuel pressure?

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.

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

Cold start fuel injector may not be working.

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

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!

It is the contents of the converter. DO NOT PUT IN MOUTH, most of the contents of the converter are very poisonous.

Could be crankshaft sensor,fuel filter,tune up ,coils.

On some 4 cyl models, the oil filter is in the bottom of the oil pan. It is a large round metal plate with a nut in the middle.Removing the filter also drains the oil. It can be very messy.

I just checked Ebay, and there are two listed. You might try Craigs List.

(Tips from me:
Port the Vortec head. Open the Intake and Exhaust ports, by smoothing them out, and smoothing the casting sprue lines out.

Put the Intake gasket, and the Exhaust gasket on the head, (After marking the area with Prussian Blue)
Scribe the opening of the gasket, onto the head, then match the ports to the scribed lines.

You also should round the valve guides top surface. (Where the valve stem meets the guide) There is a square edge that needs to be rounded. This square edge interferes with the fuel/air mixture, as the sharp edge breaks the fuel/air mixture down into droplets.
You want to keep the fuel/air mixture atomized, Not droplets.

Also narrow the casting that comes up the side of the valve guide. (Squared off shape that follows up the guide, and makes the Vortec shape swirl shape in the Intake port) Narrow it to more of a small rounded edge.

Do not polish the Bottom of the intake ports. Leave them as a rough casting. Smooth, and polish the Sides, and Top of the Intake port. (Do not get Extreme! You'll go into the water jacket with your die grinder! Factory may have had a casting shift that day. Just smooth things up)

Makes a nice swirl pattern for the fuel/air mixture.
If you polish the floor, (Bottom), of the Intake port, you will create Two swirl patterns, and they will collide with each other, making droplets again. (They cancel each other out. You want one nice swirl pattern flowing through the Intake port)

I can bring my 1985 Fiero up to 155Mph, (On dragstrip set up for this, tires, and proper safety equipment used). I can also 'Keep my foot' out of the throttle, and get 45 miles to the gallon on the highway.

You can use flat top 350 Chevy pistons. The 2.5 Vin R Fiero engine has a 4 inch bore like a small block Chevy. The pistons can be put on the Fiero rods. Same wrist pin size. The piston drops down into the engine block, about .030 below deck height.

(Wrist pin to piston crown height, is .030 shorter with 350 Chevy piston, compared to stock Fiero piston. You can buy 4 - 350 Chevy pistons AND rings, compared to the price of just the rings, for a Fiero!)

(Thirty thousandths. Real close to 1/32nd of an inch. .03125 is 1/32nd of an inch)

Fiero's have dish head pistons, so the drop in deck height, and using a Flat Top 350 Chevy piston equals out. (Better flame travel with flat top piston. Better burn, more power. Uses more of the fuel/air mixture than a dish head design)
If you can't afford to have them balanced, use a beam scale, and balance them yourself.

I can bring my 1985 Fiero up to 155Mph, (On dragstrip set up for this, and proper safety equipment used). I can also 'Keep my foot' out of the throttle, and get => 45 miles to the gallon on the highway. (Throttle Body Fuel Injection. TBI)

Makes a V6 Fiero cringe!

the camshaft gear on the 4 cylinder engine is pressed on you need to remove the camshaft to press the gear off. it would be damaged if you try to do it in the engine.

5 quarts