Jaymez

I'm starting to hate this truck.

I had a hell of a time getting my truck to start and run properly after sitting for a few months so I swapped in some 24lb injectors and opened the butterflies a bit.

It started up and ran great at idle. Decided today would be the day I'd take it for a cruise. After idling fine for a few minutes, I put the truck in reverse to back out of my garage and the SOB died on me. Start it back up without a problem. Put it in gear, it would die on me again.

After pulling the truck back in the garage, I put the fuel pressure tester on and found out I was getting 42PSI before I fire it up, 42PSI at idle, and 42 PSI in gear.

I decided to try taking the truck for a ride again. This time it actually stayed running when I tried to move it! However when I tried to climb the hill by my house, the damn thing would bog down and almost stall. After trying to climb the hill a couple of times I realized that the transmission was in the wrong gear.

The truck has a 700R4 with a 2600 stall. As I go to climb the hill, the speedometer reads 25MPH, but, I know that is off because I swapped taller tires just the other day. If I dropped the transmission into 2nd or 3rd it would climb the hill just fine. It bogs down when I leave it in Drive.

I had it rebuilt last year before I installed it. Corvette Servo, high heat 3rd and 4th gears. I've only got 200 miles on the transmission since the truck was first put on the road.

Something just feels "off" about the whole truck. Its bark is far worse than its bite. Granted, I don't expect to get any traction with a 10 bolt dog legger with 3.73s and 225/75/15's. Even when the tires don't slip the growl from the motor doesn't match the acceleration at all. Something has to be mismatched. I'm not smart enough to know what that is.

The motor is a pretty much stock LT1 with an LT4 hot cam kit. No other go fast goodies just yet.

Evil Eric

iTrader: (3)

Its been a while since I toyed with anything except a TH350 and a 4l60, but is the 700R4 vaccuum modulated? I had a severed line between the tranny and the carb on a C10 that had a 455 olds in it, that thing ran crazy and would never shift right until the vacuum line was fixed.

Jaymez

Ya know what. I think it is vacuum modulated.

I went to drive the truck today without letting the motor warm up for more than 5 minutes and as soon as I put it in gear, the damn thing stalled. It runs fine after it has been idling for 10 minutes.

Sounds like it is time to start chasing down a vac problem. Thanks!

00Silv4.8

iTrader: (10)

maybe I missed something.. is this injected or carb'd? It sounds like the tune is off somewhere.

Jaymez

It is injected. Thought about converting it to carb, but, unless I found a killer deal on all the parts that won't happen.

Big Port Jimmy 6

iTrader: (2)

700r4s are not vacumm modulated. The are controlled by the TV cable.