I have an 87' Firebird Formula w/ a 350 TPI system. The engine has about 15000 miles on it. The problem is that after about3700-4000 RPM it won't pull anymore. I have replaced the fuel pump, strainer, fuel filter, fuel preasure reg.(also installed an adjustable), plugs, wires, distributor cap & button,02 sensor and the module in the distributor(it died). One more thing, while I had it plugged into a OTC 4000 it showed that the BLM would go to 255 after driveing for a little while. The TPS and IAC are set, and the O2 count is good as well(altough it smells rich at idle). Any suggestions would be great! TIA

------------------
dgreene
'87 Firebird Formula 350 TPI, Ported Plenum, Adj. Fuel reg, gutted cat, catback exhaust, air foil, K&N air filter, chip,170 thermostat,Borg Warner Posi 9 Bolt w/ 3.23 gears....

 

OK. I went back and set the timing, TPS, IAC, and set the fuel preasure to 44 PSI static. I runs somewhat better(pulls real good) up until 4200 now, and then it just drops off. I'll keep trying....

------------------
dgreene
'87 Firebird Formula 350 TPI, Ported Plenum, Adj. Fuel reg, gutted cat, catback exhaust, air foil, K&N air filter, chip,170 thermostat,Borg Warner Posi 9 Bolt w/ 3.23 gears....

 

Well, I kept digging through the archives and found the answer to my own question. Thanks to anyone that read this and at least gave it some thought.

------------------
dgreene
'87 Firebird Formula 350 TPI, Ported Plenum, Adj. Fuel reg, gutted cat, catback exhaust, air foil, K&N air filter, chip,170 thermostat,Borg Warner Posi 9 Bolt w/ 3.23 gears....

 

So what was the problem? Was the fuel pressure dropping off?

------------------
87 Formula 350 13.94@96.67
98 Z28 1LE 13.15@107.59
1LE Owners Association

 

Sounds Like YOu just have TPI



------------------
60 Ranchero - Project ( Money Hole )
85 Sport Coupe LG4 - Daily Driver 14.82 @ 91.1 (faster than Ed)
Reader's ride -> My Ride

Just another Hot Rod kid, or thats what they all tell me.
Livin' the Stereotype

 

Bort62 you hit it on the head. I didn't realize that these systems had this limitation from the factory. This is the only one that I have and I didn't buy it new. I thought something was "wrong" with it. So, I guess my new question would be: What do I need to do to it to make it turn up a little more? I will be looking through the archives in the mean time and see what I find.



------------------
dgreene
'87 Firebird Formula 350 TPI, Ported Plenum, Adj. Fuel reg, gutted cat, catback exhaust, air foil, K&N air filter, chip,170 thermostat,Borg Warner Posi 9 Bolt w/ 3.23 gears....

 

Any suggestions on the BLM going to 255?

------------------
dgreene
'87 Firebird Formula 350 TPI, Ported Plenum, Adj. Fuel reg, gutted cat, catback exhaust, air foil, K&N air filter, chip,170 thermostat,Borg Warner Posi 9 Bolt w/ 3.23 gears....