Good Sam Club Open Roads Forum: 80's 454 fuel supply challenges
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 > 80's 454 fuel supply challenges

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Jarlaxle

New England

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Joined: 11/18/2006

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Posted: 07/21/21 12:16am Link  |  Quote  |  Print  |  Notify Moderator

Probably not, with EFI.


John and Elizabeth (Liz), with Briza the size XL tabby
St. Bernard Marm, cats Vierna and Maya...RIP. ">
Current rig:
1992 International Genesis school bus conversion

2 many 2

USA

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Posted: 08/02/21 06:17am Link  |  Quote  |  Print  |  Notify Moderator

Any Up-Dates?

udidwht

Seattle

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Posted: 08/03/21 01:44am Link  |  Quote  |  Print  |  Notify Moderator

For TBI troubleshooting...

https://harristuning.com/Tbi/troubleshooting/

94-95 TBI years were 26-32psi fuel pressure. You also need to be sure you're running the correct flow rated injectors for your year engine. Only use AC Delco parts. Do not cheap out.

Even a bad TPS can cause the issue you're having.

You mention 220 - 280 temps?

The dash gauge even have 280? Or is it 260? It is normal behavior to see these era RVs go as high as ~240 on long grade pulls. What is important is to be certain you hear the clutch fan kicking in. That is what prevents the temp from boiling over. A normal operating range on the flats is generally 205 - 217 or so. Your dash gauge will rarely reflect that accurately. Usually read higher by as much as 10-2X degrees depending on ambient temp.

Water also cools better than coolant so get the ratio at min 50/50 (distilled water). Pre-mix is already mixed with distilled water. With 454s I like 60 percent water vs 40 percent coolant.

Those year coaches run with a 195 T-stat. Do not use one less than that. It will throw off the PCM. I'd also pull the distributor and replace the pick-up coil and visually inspect the stator ring. The ring is known to crack messing with timing.

* This post was last edited 03/28/22 12:21am by udidwht *   View edit history


1994 Fleetwood Southwind Storm
P-30 chassis 7.4L 454 TBI 58,301 miles and counting....(as of 06/08/19)
VIN# 1GBJP37N4R3314754
Flight System Generator man 360 (PM me)

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