Ok so I just got my first Fiero after admiring them forever.I bought a pretty sweet 87 with 109xxx miles.I heard it run a couple months before i bought it then the fuel pump went out and the kid didnt want to fix so I got it cheap.I put in a new pump,sock,filter and MAP.Heres the problem,It fires right up idles a little rough but not too bad.Press the gas and at about 3800r's it acts like it's running on 2 cylinders.Ive done all the normal tests,timing,spark etc. and it all checks out fine.This duke runs super strong until i hit 3800 then it craps out.If anyone has a clue please let me know what 2 do.I have read on PFF that these cars are picky and there are little tricks to them so if you know a trick to fix this or even an idea of the problem,throw a guy a bone and I'll try it.Thanks.

I installed new plugs,wires and cleaned the coil packs up.i do not get an engine light which is what is baffeling me.I would think that a problem like would throw a code.It's really got me puzzled.

Yup new fuel filter and sock.Im gonna try a couple things tommorow if it dont rain on me.I'm thinking on dropping the tank and replacing the little rubber hose between the pump and steel line,I have heard this will cause this kind of trouble.While I got it in the air  I am gonna take some measurements for a v8 swap.If I cant make the duke run right its gonna get dumped out for a (dare I say this) a Mopar crate 360 that I have just laying around.I would really like to get the duke running proper so I can get other projects done but this one is priority.If anyone has a suggestion please let me know.Thanx.

Man I've checked it out as well and its fine.I just dont know what else to do.It was raining most of the day so I didnt get a chance to drop the tank but I plan to do so tommorow weather permitting.I'll post more tommorow if I figure something out.

New fuel pump same problem.While I was turning wrenches I also relplaced the egr gasket and valve cover gasket.I did however discover that this car comes with a couple of "hidden" options,bloody knuckels and severe headaches.Sorry just a little humor,trying to make light of an omnious situation.Not to mention the I got the wife telling me I told you not to buy it speech,lol.Any more ideas feel free to share.

I have searched on PFF and find alot of similar problems and tried their fixes but nothing seems to help.I wonder,could it be that even though the compression check came out great,could the lifters be floating out at high rpm's?I have had this problem with a few of my big-block Mopar motors and it kinda acts the same way.I dont do much GM work I'm Mopar or no car born and bred,but I really like this car and would love to put it down the street as a daily driver,but if something dont change I'm just gonna put a for sale sighn on it.

The redline is 5000.I did notice while i was running it earlier that the fuel spray at idle was a fine mist cone pattern.As I accelerated it became a tighter higher volume almost stream and it was backfiring through the exhaust.Is this spray pattern common?

No cat,no muff,just a fart can.Not my idea that is the way I bought it.