aljohnsonii

I don't have any power I can barely do 60mph at idle it revs fine sounds like nothing's wrond but min I drive down road it starts I have no throttle response didn't find any vacuum leaks I'm lost thought maybe some injectors might be cloged but I need help this has been goin on for a week and I'd like to drive my car it's a 1987 Camaro 305 mass air flow tpi setup please help

ninetyone

iTrader: (2)

try unplugging maf and drive,ohm injectors with a multimeter.

aljohnsonii

They at 10 ohms like book said suppose to be so it will run w/o maf

aljohnsonii

It runs worse with unplugged I got a code 33 pop up to forgot to include that in book it says it's for map sensor but don't have a map sensor with maf sensor so I'm lost on that and I think all my injectors are workin I hear all of them clicking so I'm out of ideals

ninetyone

iTrader: (2)

you need to ohm the inj.

JP86SS

iTrader: (1)

Confirm your base timing is set correctly and check/replace your fuel filter. Simplest things can keep you down.

b1k1w1

are there any other problems like high revs, in park can you hold at other rpms with no problems ( only do just long enough to see and not to high). Fuel filter good idea also any maintenance like timing chain, plugs wires cap rotor that may be due. Check coil when they get weak you can lose power. If all that is good make sure trans is not slipping.

aljohnsonii

Car was running fine on throttle body changed the computer out an put a brand new harness in car this would be the 3Rd time I've done this swap but first going to maf instead of map sensor

b1k1w1

first check over everything. Even make sure its the right computer. If the only thing you changed was that and everything worked before odds are its in the new. Only other thing check fuel psi.

aljohnsonii

Everything is new new injectors new computer had a throttle body in it before with psi of 20 my service manual from dealer has that as Mac for tbi and shows 40 for tpi I checked the part number on the fuel pump and it shows to be different for tpi I thought I changed it but it was changed in other Camaro I'm going to install the other fuel pump and see what happens I know everything was working before cause I took my tpi setup off my other Camaro

ninetyone

iTrader: (2)

fuel pressure is check with the car running and idling with the FPR vacuum hose plugged and the other side on the plenum plugged. This simulated WOT. Fuel pressure should be at 43.5 psi. or close.

chazman

iTrader: (4)

Are you sure that your cat isn't clogged?

aljohnsonii

Yes car was running fine with the throttle body setup I had on it I installed the new tpi system and the pressure will not get about 20 psi which is max for the fuel pump installed in the car for a throttle body system that was on the car before I changed it to tpi plus there is not cat on car cut it out long time ago I just need to change fuel pump will let y'all know how it goes

b1k1w1

yeah that will do it. I'm in the middle of same conversion, just put fuel pump in on to the next part. Good luck

aljohnsonii

Thanks same to you this is third time I've done it but you always run into problems

aljohnsonii

Ok replaced the fuel pump and have car running it will do 60 now but it's idles rough and when I mash gas goin down road my lifters start rattiling I'm getting a error code 33 map sensor but the car has a mass air flow need some help on what it might be also car is running rich