engine lacks power while towing - Nissan Titan Forum
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post #1 of 10 (permalink) Old 05-23-2017, 12:23 PM Thread Starter
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Question engine lacks power while towing

I have an 07 titan king cab. Was towing a 19 foot pop up camper and the engine started to surge and loss power, ended up only being able to go 55 mph at the end. Engine light came on and then it went off. any help?
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post #2 of 10 (permalink) Old 05-23-2017, 12:41 PM
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Re: engine lacks power while towing

Check for soft codes with a code reader. If the MIL or mostly called "engine" light came on then the code is still there even though you MIL light went out. This code will lead you to your issue.

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post #3 of 10 (permalink) Old 05-23-2017, 12:48 PM Thread Starter
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Re: engine lacks power while towing

Thanks will check it today and get back with you
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post #4 of 10 (permalink) Old 05-23-2017, 04:54 PM
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Re: engine lacks power while towing

Check your manifolds.


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post #5 of 10 (permalink) Old 05-23-2017, 08:25 PM
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Re: engine lacks power while towing

What were your engine and transmission temperature gauges doing?

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Re: engine lacks power while towing

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Originally Posted by HRTKD View Post
What were your engine and transmission temperature gauges doing?

^----- This. I'm no expert, but my first thought was 'how much did you cook the tranny'.

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post #7 of 10 (permalink) Old 05-23-2017, 09:27 PM
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Re: engine lacks power while towing

I've run the engine and transmission temps up a bit a couple of times but never lost power. Maybe this is a fuel pump problem?

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post #8 of 10 (permalink) Old 05-24-2017, 11:37 AM
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Re: engine lacks power while towing

the fuel pump was my first thought too....a suspect fuel pump won't set a code, but a misfire due to lean would and could also go away just as fast....the only way I can check a fuel pump is at the rail with a pressure gauge.

how does it run when not pulling the trailer? Can you get to speed?

here's the nerd part: A random misfire code usually means the air/fuel mixture is running lean. But the cause might be anything from a hard-to-find vacuum leak to dirty fuel injectors, crank sensor failing, low fuel pressure, a weak ignition coil, bad plug wires, or compression problems. Now....dirty injectors are something I'm always on the lookout for since the only fuel filtering in these trucks takes place at the pickup sock in the tank. The pick up sock isn't nearly as effective at filtering as a standard in line filter can is, once that sock loads up with crap, a lean fuel condition at speed or under load is highly possible. Enough time, enough bad gas, enough gunk or varnish and then next check to make.... eventually it's injector time. if you get a random misfire code that lights up and then goes away, intermittently...suspect the fuel pump first. If that is the code you pull and it becomes permanently lit up, you may have a full blown Easter egg hunt on your hands.

Now, what if you don't have a stored code.....get around back with the engine running and have someone else rev the engine to around 3000 rpm. With your hand near, but not too near the exhaust pipe, try to feel for good flow. If you can't get to 3000 rpm or you get a sputtering and it seems like the exhaust is weak, you may be dealing with clogged cat(s).

Last edited by Nick Name; 05-24-2017 at 11:48 AM.
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post #9 of 10 (permalink) Old 05-25-2017, 08:03 AM
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Re: engine lacks power while towing

I agree above - check manifolds and cats. My truck feels 'under powered' right now with cracked manifolds. I had a faulty fuel pump a few years back. It never caused a problem while the truck was running, but sometimes it just wouldn't start.. Then finally one day, it decided it was never starting again. I towed it home, change fuel pump - never had an issue again. But never once while running did it run any different or with less power. If all of the sudden you lost some fuel pressure, I'd think it would buck and sputter like crazy. But I suppose there could be different types of failures the fuel pump can experience...
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post #10 of 10 (permalink) Old 06-13-2017, 07:00 AM
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Re: engine lacks power while towing

Wonder if the OP is ever figured this out??
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