01 Corolla Idle problems

[bcmracine1]

I had codes P0171, P0302, P0304, P0300. I changed the sprat plugs, changed the MAF sensor and now it idles rough, cant get it do go into drive or reverse, smell of gas, HELP

[AlaricD]

Originally Posted by bcmracine1

I had codes P0171, P0302, P0304, P0300. I changed the sprat plugs, changed the MAF sensor and now it idles rough, cant get it do go into drive or reverse, smell of gas, HELP

Remember to put your foot on the brake to shift out of park.

Also, throwing parts on a car simply because you get certain ODB-II codes is not really the best way to fix anything. Some subsystems have dependencies on other subsystems so that a failure on a completely different part will show a misleading code. For example, P0171 could mean a dirty or failed MAF, or a large vacuum leak. P0302 and P0304 are codes for misfires on cylinders 2 and 4; P0300 is "random/multiple cylinder misfire". That could mean bad coil packs, or it could mean an overly lean condition, again pointing to a vacuum leak. Check all the vacuum lines, in particular the line going to the brake booster.