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99 Ford 5.4 with gfi control systems
Looking for some info if anyone is familiar with this propane conversion [...] [[...]] . Vehicle idles and runs poorly with 35+ fuel trims. I would like to lock out the propane system and start with base gas engine. Unsure what changes where made to PCM sensor... Login to read more. 
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| Engine | 5.4 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
1999 Ford E-250 Econoline 5.4L
| Engine | 5.4 L |
| Trans | 4-speed Automatic (Electronic) |
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