Help, smoke, gas smell, stuttering

[MississippiMaro]

Aight so i broke down and bought an AutoXray tool for my 93 'maro...wow what a tool....anyway here's what i found out

This is just one reading i did during lunch i'm going to do some more in-depth readings soon, but i think i found some problems

TPS Voltage 0.62 @ idle - 1.41 @ 5000 RPM
Injector Pulse - 4.4 @ idle (went up to 6.x something when i was monitoring it)

Alright all you guys that REALLY know the 3.4, throw some scenarios at me.

[MississippiMaro]

TTT

[gregmondro]

<blockquote>quote:</font><hr>Originally posted by MississippiMaro:
Aight so i broke down and bought an AutoXray tool for my 93 'maro...wow what a tool....anyway here's what i found out

This is just one reading i did during lunch i'm going to do some more in-depth readings soon, but i think i found some problems

TPS Voltage 0.62 @ idle - 1.41 @ 5000 RPM
Injector Pulse - 4.4 @ idle (went up to 6.x something when i was monitoring it)

Alright all you guys that REALLY know the 3.4, throw some scenarios at me.<hr></blockquote>


when did you do these readings?
right when you started the car
after you had driven it for a while

these all make determining factors when datalogging.

[MississippiMaro]

Alright i'm really at a loss, i changed the oxygen sensors to see if that made a difference with some used ones i have and now i'm really confused.

The car ran ok (not great but much better) for like 5 mins and then it continued to degrade until it was running the way it has been running.

Here are some questions

What are normal Injector pulse readings?

What are normal TPS readings?

here are my latest readings

Injector pulse -&gt;
10.40 ms - 13.30 ms @ 2422 - 2952 RPM

Throttle Postition Sensor -&gt;
1.52 volts - 2.13 volts @ 2422 - 2952 RPM

[MississippiMaro]

I got new fuel injectors and an AFPR to install in the car thinking that a fuel injector was stuck open, thereby causing my pressure problem.

All my stuff came in from Summit and Scoggin Dickie just in time to start saturday morning.

Since i just replaced my oil gear drive, i was able to get the fuel rail and the upper intake off quickly this time since i am more familiar with this part of the engine.

Here's the kicker as i'm undoing the intake bolts i notice they're extremely easy to undo - and then it hits me it was an intkae leak causing the pressure problem. the further back i got the bolts were extremely loose. This is probably due to the 250 mile trip fron B-ham with a bad coil. So i ended up getting new Accel fuel injectors and an AFPR and a diagnostic computer for what could have been fixed by the turn of a wrench. But on the upside i got a lot more power back and smoothed out the engine some. Plus the diagnostic computer has helped me trace some festering problems. But the most important thing is SHE IS FIXED....

[3.4 slow to go]

Overall seems kinda expensive to fix it, but glad it is. Someting non of us even thought of too [img]graemlins/slap.gif[/img] [img]graemlins/dunce.gif[/img] , but you got some brand new stuff out of it though ;)

[MississippiMaro]

yeah and the more I drive with these new injectors, the happier I am that i did it. Plus you can't beat the Auto Xray for an OBD I car. It's worth its weight in gold. Now it's time for the heads work i've been waiting to do. Probably some roller rockers, a nice cam and exhaust to go with it.