Engine dies shifting to 2nd

[solracem]

Hello,

I have a 34' 1989 Fleetwood Bounder on a Chevy P32 Chassis. THe darn thing sat for 6 years, so, I've replaced serveral things. Recently I replaced the carburetor with a Uremco 3-3837 and it's now running. However, it does not shift from 1st to 2nd gear without dying.

I was told the throttle position sensor (TPS) and idle air control motor (IAC) should be replaced and it should fix the issue. I was also told that if it does not fix the issue it's most likely because my engine control module (ECM) got use to running a certain way and it probably needs to be replaced as well. The manual says the ECM should be under the steering column suppport bracket but, it's not there.

I cannot for the life of me figure out where any of those parts are located on the 454. I've read several threads and see that the TPS is usually on the throttle body (TBI) but, cannot find it. I'm also confused since it has a carburetor and is not fuel injected.

Does anybody know where I can find those components? Or any other suggestions on what could be the problem?

So far I've replaced these components of the fuel system:
vacuum hoses
carburetor
fuel filters
fuel pump
spark plugs and wires
distributor cap and rotor

Thanks so much for the help!!

[SLEETH]

no ecm on this unit im afraid

[bluebird]

I was told the throttle position sensor (TPS) and idle air control motor (IAC) should be replaced and it should fix the issue. I was also told that if it does not fix the issue it's most likely because my engine control module (ECM) got use to running a certain way and it probably needs to be replaced as well. The manual says the ECM should be under the steering column suppport bracket but, it's not there.

Your coach won't have any of this stuff. If you break down the vin number it may even be a 88 chassis, not uncommon for the chassis to be a year older. Really hard to say why it's dying though. I would suspect it's carb related though. Sometimes those rebuilds aren't very good. Did you keep your original carb by chance? I would think a MH would need a richer mixture than say a pickup truck.

[DaveVA78Chieftain]

I was told the throttle position sensor (TPS) and idle air control motor (IAC) should be replaced and it should fix the issue.

Who ever is telling your this is not hearing you say the word carburetor because the terms TPS and IAC only apply to TBI fuel injected systems used from 1990 and on.

Sounds like a performance issue.
First step is to check timing to make sure it is set correctly

Other possibilities:
Vacuum advance bellow in distributor has failed (vacuum leak)
Centrifugal advance mechanism is frozen up (no timing advance as engine revs increase)
Timing chain stretched and slipped a tooth
You changed out vacuum hoses.  Did you accidentally swap locations of a couple of hoses?
Incorrect adjustment of transmission upshift linkage
Transmission Vacuum Modulator is defective resulting in incorrect shift point bogging down the engine.