Overheating and raw gas being pumped into exhaust

Asked by Jul 29, 2017 at 06:41 AM about the 1996 Ford F-150 XLT LB

Question type: General

I can run my truck for a while and it will overheat.  I thought it
was the O2 sensor or the fuel pressure regulator,  so I
replaced them both.  I seen the exhaust was rusted,  had that
replaced.  The cylinders may be miss firing,  so I'm changing
them. Could this be the reason for over heating and raw fuel
being dumped into the exhaust.

5 Answers


Yes, misfires won't burn the fuel properly and dump it into the cats, ruling them. At some point they will start clogging and glowing red. Your CEL will be on if there are misfires. So scan for the codes to find which cylinder is the issue. Change the plugs and wires if you haven't yet.

1 of 1 people found this helpful.

The cylinders may be miss-firing so you are going to replace them? Don't you mean spark plugs. Have it scanned for trouble codes at any local auto parts store and determine where and in what system the issue is. The do a proper diagnosis and don't throw parts at it.

1 of 1 people found this helpful.

I replaced all spark plugs and hoses yesterday. I'm waiting for another code test. I also replaced the vacuum hoses.


Ok, let us know what you come up with.

What's going on folks. OK so as an update... The truck is back to running! It so happens thar the vacuum hose was corroded and had a hole, so that was the issue to take care of. In any event all the parts I dumped into it, is now something that I don't need to worry about for a while. I'm also going to look for a newer engine with less miles on it. Yet another project to look forward to. Thanks for the input fellas!

Your Answer


Looking for a Used F-150 in your area?

CarGurus has 10,105 nationwide F-150 listings starting at $1,800.

Postal Code:

Ford F-150 Experts

  • #1
  • #2
  • #3
View All

Related Models For Sale

Used GMC Sierra 1500
278 Great Deals out of 10,513 listings starting at $1,800
Used Dodge Ram 1500
40 Great Deals out of 505 listings starting at $2,500
Used Toyota Tacoma
37 Great Deals out of 965 listings starting at $5,850
Used Ford Mustang
8 Great Deals out of 1,017 listings starting at $4,500
Used Ford F-250
5 listings
Used Chevrolet Tahoe
5 Great Deals out of 738 listings starting at $899
Used Ford Explorer
50 Great Deals out of 1,448 listings starting at $2,995

Used Cars For Sale

2014 Ford F-150 XLT LB For Sale
1 listings starting at $13,800

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.