beady
Full Access Member
- Joined
- Jul 20, 2024
- Posts
- 75
- Reaction score
- 32
- Location
- Tidewater/Northern Neck VA
- First Name
- Mine
- Truck Year
- 1987
- Truck Model
- R20
- Engine Size
- 454
Hello again, I have this new to me 1987 454 TBI suburban that I’ve been chasing problems down in. Today’s issue is stalling after a few mins of idling.
The previous problem was power being way down, to the point where it would max out at 47 mph and you could only use literally the first 1/4” of throttle travel before it would rev seemingly ok, but make even less power. This turned out to be a loose/worn distributor/cap. I replaced distributor and more, and it ran pretty well for a week. I put maybe 50 miles on it, but last week I started it and walked away and it stalled a minute or so later. Now seems to be the truck’s MO. What I’ve replaced or checked:
Brand new:
DUI distributor, coil, wires
Delco plugs
MAP sensor
Delco injectors
Delco FPR rebuild kit
Fuel pressure was 13 psig after filter
Timing set at 4-5 dtbc with ignition wire disconnected
Here’s a video of it stalling I took earlier today:
The last thing I did was the distributor, coil, plugs, wires all at once. The idle sounds great, nice and smooth, no bounce or bauble. I’d love any thoughts or ideas on what to do/check next.
Thanks,
Mike
The previous problem was power being way down, to the point where it would max out at 47 mph and you could only use literally the first 1/4” of throttle travel before it would rev seemingly ok, but make even less power. This turned out to be a loose/worn distributor/cap. I replaced distributor and more, and it ran pretty well for a week. I put maybe 50 miles on it, but last week I started it and walked away and it stalled a minute or so later. Now seems to be the truck’s MO. What I’ve replaced or checked:
Brand new:
DUI distributor, coil, wires
Delco plugs
MAP sensor
Delco injectors
Delco FPR rebuild kit
Fuel pressure was 13 psig after filter
Timing set at 4-5 dtbc with ignition wire disconnected
Here’s a video of it stalling I took earlier today:
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The last thing I did was the distributor, coil, plugs, wires all at once. The idle sounds great, nice and smooth, no bounce or bauble. I’d love any thoughts or ideas on what to do/check next.
Thanks,
Mike
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