Question about Metra 1993-94 Lexus Ls400 Stereo/radio Dash Kit Combo 99-8156

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New coil pack fitted but still misfire and slow to pick up

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Have you ever had your fuel injectors cleaned by a Lexus dealer? That's my guess, worked wonders on my Mustang, only 65K and they were clogged up. Only the dealers shops can clean them properly, it uses a specific machine made just for that cars engine to get them clean. Also check fuel filter and possibly even fuel pump

Posted on Nov 16, 2014

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Posted on Jan 02, 2017

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1 Answer

What causes Honda fit to misfire on inline coil packs.i tested the coil packs with the front connectors and all of the misfiring coil packs started producing spark.


Just because the coil is firing doesn't mean the coil is operating correctly. As far as the connectors rockauto.com has a good selection of connectors to be spliced in

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I start the car and it trembles. And then I turn it off and back on again and it stops trembling. What could be the cause of this?


Did you erase the codes after you installed the new parts? You need to do this first as they do not disappear by themselves. If after you erase the codes with the new parts in, and the codes show up again, the parts might not be the issue.

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What causes engine misfires to stay after new plugs and coil packs?


Try swapping the coil packs around - like swap #1 with #2, and swap #6 with #5, see if the misfires MOVE with the coil packs swapped to the new cylinders or if they stay with the cylinders. If they move with the coil packs, the new coil packs are bad. If they stay with the cylinders, there's a problem with those cylinders. You DID replace that camshaft sensor, right?

Have you checked your #1 and #6 injectors?

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Does oxy sensor cause a slight missfire


Not really

Bad ignition coils on fords are all too common

O2 Sensors will slow down as far as switching times go
& I suggest you replavce the fromt or upstream ones before
the converters at 100,000 miles

You may notice a quicker throttle response with new sensors
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You can check for misfire counts with professional tools,even that
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You should check for codes & fuel trim on both banks as well as
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My 1999 Buick Century Custom began to shake when i turned it on, it seemed to stop or i didnt notice it as much when I picked up speed, but when i slow to take corners or back up it shakes. The service...


Okay, this sounds like its misfiring, the engine light is on because the computer sees a problem, if you have the computer scanned it will tell you where the problem is, for example it will give a code and say cylinder 2 misfire.autozone will scan for free, if its a misfire i would start with a tune up , spark plugs ,sparkplug wires and air and fuel as needed, then see how it drives from there, the light can be cleared at autozone also, if it still picks up a misfire then depending on the cylinder you may have a bad coil pack also, there are three packs one controls two cylinders so depending on the cyliner misfiring thats the coil to replace, they should be labeled but if not just follow the wire to coil from cylinder, they are as follows, rear cylinders from left to right are cylinders 135 the front 246, hope this helps.

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I have a 2002 TrailBlazer with the straight 6,diognostic check said #3 cylinder was dead or misfiring, also map sensor showed up. #3 cylinder was misfiring, so to test the coil pack I swapped #3 coil pack...


did you replace only one spark plug? that can cause issues because of differences in resistances between cylinders. also, did the map code stay off after replacing
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Misfire on one cylender that comes and goes new


I had a bike in the shop with the same problem and it turned out to be the CDI that is attached to the back done under the tank. Had to get a new one and they are not cheep. $500 spent.

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look at your spark plugs holes, one or two probably have water in them, from car wash or condensation from the coil cover

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