90 Chevy 3.1 has a dead spot on acceleration?

Question

i have installed 2 injectors and a tps. It has 41 psi fuel pressure. It also starts hard when warm, acts flooded. Where do I go next?

Answer 1

fuel pump fuel pressure regulator and check the coils :{

Answer 2

first, after warm shut down what is rest fuel pressure? it should be at least 20 psi after 30 min. if not block off pressure and return lines[do not pinch plastic tubing fuel lines , if equipped] if pressure still drops check for another leaky injector[s] or fuel press regulator leak through vacuum port if all ok here then check fuel press running [should be approx 35 psi with vacuum to regulator] if not replace regulator.
second what do the temp sensors say? [scan tool state display] or ohm meter reading coolant temp sensor at operating temp[180-195 deg-f] should be approx 200-290 ohms. air temp at 65-70 deg. f. should be 2000-3000 ohms replace as required
third these early engines used both a air mass sensor and a map sensor, both gave trouble map sensor was usually hidden near pass side firewall [follow vac hoses] and was the least prone to give trouble. the air mass unit the most prone,[the mass air sensors always tested good] but car would never run or start properly until replaced. good luck and no smoking or bare drop-lights around fuel and or open fuel lines..

Answer 3

Try the coolant temperature sensor. If it is not working, the car thinks it's cold when it's actually warm, and supplies more fuel, flooding the engine.

Answer 4

i had alumina with that problem, it turned out to be a bad fuel pump, also vapor lock in the gas tank, try loosening your fuel cap that mayhelp. any other questions let me know, i am a certified auto technician, also fuel pressure regulator, another problem those are know for id the coil packs, and also ignition module.

Answer 5

Have you checked the fuel pressure regulator?

Answer 6

sounds liek to much fuel pressure to mee

Answer 7

sounds like lifters