Backfire

Please help I have a 1997 Tacoma 2.4 liter that idles a little rough however when get in gear no go it sprayer an backfire going maybe 10 mph however with gas to floor it will slow speed up however continues backfire I’ve changed egr,fuel filter,spark plugs and wires an also 02 sensor still same problem

 

Was it doing it before you did the wires and spark plugs? Is it a loud back fire? or just popping on reving?

 

I'm thinking you have plug wires crossed or the timing is off.

Please give us details.

Do you have a check engine light and is it flashing?

How hard is it to get the truck to start?

The more details you can provide, the better we can help you.

In addition, many of us know pro techs that we can forward your questions too.

We are listening.

 

Poping when giving gas

 

Recheck your wires, check the order of the distributor etc.

You could have burnt valves. This can be hard to test, but a compression test catches them most of the time. Or a cheap Amazon borescope.

 

I it starts fairly easy however makes all kind of noise I had plugs. Gaped at 0.32 just changed to 0.40 no help however if I get it rolling it runs fine about 55mph however if put cruise control on can feel it like jumping an only occasional backfire however starting off content backfire or poping sound

 

You must have a CEL on? It really sounds like your timing is off.

 

Was happening b4 I changed wires Do anyone think it could be coil packs don’t know what else to change also compression testing maybe more then I can handle i may have to bring to shop

 

What would cause timing to get off an also what’s the chances that it could be fixed with very little mechanical experience

 

Yes, it does sound like you should take it to a shop. Be honest. Tell them you want to learn why your truck is acting this way. Tell them that you will be passing along what was found wrong to your friends for future reference (us here). Also tell them that you will be returning for future issues if the problem is resolved reasonably.

 

You have not told us if you have a check engine light. There is not much we can do untile we know what "code" is associated with that light.

 

Thankyou for the help I will give mechanic y’all thoughts and I also will keep everyone informed because I also have problem when put gas cap on gas will start pouring out of hose coming from black box

 

No Check engine light on an I’m 90percent sure it works

 

Someone took the dash apart and took out the light bulb.

If you got gas coming out the black box under the hood, you definitely have a CEL.

Take the truck to AutoZone and have them scan your truck. It doesn't matter if the bulb is removed, it will still record the codes.

I'm guessing you are not in a state that's has annual emmision testing..

 

I’m in south Louisiana my truck has 270,000!on it I bought it fro m original owner however I will try computer again do have any ideal how much a timing job is also as long as I don’t put gas cap on truck doesn’t leak gas also what is a cel?

 

CEL is the light on the dash that looks like an outline of an engine.

You should have no lights in the instrument cluster 5 seconds after you start the truck. The only lights you should see are turn signals and bright light indicators.

Anything else should be researched. Let us know. There is huge knowledge base here and we all want to help.

 

Thankyou an I also have 4Runner so thankful to find site

 

You are welcome.

Four runners are very similar to tacomas. Many things are the same.

Ask any questions you want.

Thanx

Kirk

 

How would I use camera to check too see if my truck has a brunt valve