# 2000 Impala 3.4 L **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [August 22, 2012, 8:06am UTC](https://community.cartalk.com/t/2000-impala-3-4-l/74228 "2012-08-22T08:06:08Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![John\_Henry](https://avatars.discourse-cdn.com/v4/letter/j/bcef8e/32.png) [@John\_Henry](https://community.cartalk.com/u/John_Henry)\ **Post date:** [August 22, 2012, 8:06am UTC](https://community.cartalk.com/t/2000-impala-3-4-l/74228/1 "2012-08-22T08:06:08Z")
I just replace the engine in my car and I had new plugs and wires put in as well. Ever since the new engine, the car doesn’t go up hills well and it is very sluggish from a stand still position. As long as I am driving on a flat surface I am good once I get up speed. I went to autozone and I got a P0300 code. Is this a bad ignition coil or maybe a clogged catalytic converter? Thanks. ---
**Author:** ![ok4450](https://avatars.discourse-cdn.com/v4/letter/o/e9bcb4/32.png) [@ok4450](https://community.cartalk.com/u/ok4450)\ **Post date:** [August 22, 2012, 9:44am UTC](https://community.cartalk.com/t/2000-impala-3-4-l/74228/2 "2012-08-22T09:44:13Z")
That code should be for a random misfire and the first suspect might be the crankshaft position sensor. I’m also assuming by new engine that you mean a new or remanufactured engine, not a salvage yard unit. Is the CEL flashing? ---
**Author:** ![John\_Henry](https://avatars.discourse-cdn.com/v4/letter/j/bcef8e/32.png) [@John\_Henry](https://community.cartalk.com/u/John_Henry)\ **Post date:** [August 22, 2012, 3:57pm UTC](https://community.cartalk.com/t/2000-impala-3-4-l/74228/3 "2012-08-22T15:57:14Z")
To be honest it is a salvage unit, and the cel is flashing. ---
**Author:** ![Big\_Marc](https://avatars.discourse-cdn.com/v4/letter/b/9d8465/32.png) [@Big\_Marc](https://community.cartalk.com/u/Big_Marc)\ **Post date:** [August 22, 2012, 4:35pm UTC](https://community.cartalk.com/t/2000-impala-3-4-l/74228/4 "2012-08-22T16:35:30Z")
the code is for a randome mis fire sould be a crank or a cam sensor. did you hear the engine run b4 you put it in the car? ---
**Author:** ![GSragtop](https://avatars.discourse-cdn.com/v4/letter/g/7c8e57/32.png) [@GSragtop](https://community.cartalk.com/u/GSragtop)\ **Post date:** [August 22, 2012, 8:02pm UTC](https://community.cartalk.com/t/2000-impala-3-4-l/74228/5 "2012-08-22T20:02:28Z")
A flashing CEL is VERY BAD… It is telling you that if you keep driving the car, damage WILL happen. Who sold you the motor? Did you get a warranty? You may need it at this point… Have you been looseing anti-freeze by any chance?? I have a theory… Let me know about the antifreeze ---
**Author:** ![John\_Henry](https://avatars.discourse-cdn.com/v4/letter/j/bcef8e/32.png) [@John\_Henry](https://community.cartalk.com/u/John_Henry)\ **Post date:** [August 22, 2012, 9:55pm UTC](https://community.cartalk.com/t/2000-impala-3-4-l/74228/6 "2012-08-22T21:55:32Z")
Yes I do have a warranty. I have not had any lost with anti-freeze. ---
**Author:** ![RemcoW](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/remcow/32/2471_2.png) [@RemcoW](https://community.cartalk.com/u/RemcoW)\ **Post date:** [August 22, 2012, 10:33pm UTC](https://community.cartalk.com/t/2000-impala-3-4-l/74228/7 "2012-08-22T22:33:21Z")
I wonder whether that new engine is timed right. No doubt it is a rebuilt engine? Maybe the belt is one tooth ahead of where it should be. ---
**Author:** ![JosephEMeehan](https://avatars.discourse-cdn.com/v4/letter/j/ecc23a/32.png) [@JosephEMeehan](https://community.cartalk.com/u/JosephEMeehan)\ **Post date:** [August 22, 2012, 10:39pm UTC](https://community.cartalk.com/t/2000-impala-3-4-l/74228/8 "2012-08-22T22:39:13Z")
I would double check to make sure the plug wires are properly installed in the right positions. However I would not drive the car until that flashing CEL has been addressed as a flashing CEL can indicate a situation that could cause damage in you attempt to drive it. ---
**Author:** ![WesternRoadtripper](https://avatars.discourse-cdn.com/v4/letter/w/a698b9/32.png) [@WesternRoadtripper](https://community.cartalk.com/u/WesternRoadtripper)\ **Post date:** [August 22, 2012, 11:00pm UTC](https://community.cartalk.com/t/2000-impala-3-4-l/74228/9 "2012-08-22T23:00:34Z")
@RemcoW: “No doubt it is a rebuilt engine?” OP says it’s a salvage engine. ---
**Author:** ![RemcoW](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/remcow/32/2471_2.png) [@RemcoW](https://community.cartalk.com/u/RemcoW)\ **Post date:** [August 22, 2012, 11:15pm UTC](https://community.cartalk.com/t/2000-impala-3-4-l/74228/10 "2012-08-22T23:15:56Z")
I’d want to make sure there’s nothing wrong with the timing. Salvage can mean you bought someone else’s trouble. ---
**Author:** ![John\_Henry](https://avatars.discourse-cdn.com/v4/letter/j/bcef8e/32.png) [@John\_Henry](https://community.cartalk.com/u/John_Henry)\ **Post date:** [August 23, 2012, 9:25pm UTC](https://community.cartalk.com/t/2000-impala-3-4-l/74228/11 "2012-08-23T21:25:21Z")
Hey guys, I wanted to give you all an update on my situation. My catalytic converter was clogged and being that money is an issue I had it straight piped. I will save up to get a new one so that I will pass my emission test. As far as the random misfire and the flashing CEL. I had two wires crossed on the tuneup. When the wires was placed in its proper alignment on the ignition coil the misfire went away. The CEL ins’t flashing anymore.