Whenever I barely push the gas and push it to the floor, the truck runs fine. Anywhere between those spots the truck spits and sputters alot. I changed the oil, air filter, new spark plug wires, and turned the distrubuter and still no luck. Help me please.
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1990 Nissan Pickup (D21)
Question: Spitting and sputtering
Answer #1Wilsonite October 06, 2009, 12:11Journeyman
Throttle position sensor?
ReplyVisitor, May 17, 2011, 19:04
I had the same problem. Replaced the egr valve and it runs like new.
Answer #2Visitor, April 28, 2010, 14:22
I have the same Problem it happens at low rpms and chugs alot i have change sparkplugs to and no luck right now im trying to clean my injectors if i find the problem i will let you know! firstname.lastname@example.org
Answer #3mctwist1386 June 03, 2010, 12:16Rookie
I have the same problem and I've replaced just about everything i can think of. I'm thinking it's either the differential or exhaust
Visitor, June 27, 2010, 15:56
I did the runaround of replacing parts. finally I tried disconnecting the wiring harness from the exhaust manifold oxygen sensor - then ir ran great. turns out it was a bad oxygen sensor sending bad information to the computer.
ReplyVisitor, December 21, 2010, 07:16
replace the vacuum lines
Answer #5Visitor, March 31, 2011, 12:43
i also had this issue, it started out with a little bit and then would sputter all the time unless the RPMs were pretty high, then i took out my exhaust manifold O2 sensor and it was broken completely, had some issues with the heat shield coming out, the AC lines where in the way, i dint have all my tools, i was on the road on vacation, so i only had my little tool box...and there is a big nut that the sensor screws into and that came out with it, took it to schucks and they got it free, but also stripped the threads, but i found a tap and rethreaded it, and i bought the new sensor and now it works great
Answer #6Visitor, May 08, 2011, 19:20
I had the same exact problem! At high rpms it bogs down it is the fuel pump! thats what mine was!
Answer #7Visitor, May 14, 2011, 11:32
It is more than likely your massair flow sensor. I went through wires, plugs, gas treatments and it still ran bad. When I got my new sensor it ran like a new truck.