Jump to content

runs rough.


handmedownreatta
 Share

Recommended Posts

like phil my car runs like crap.it has no current codes two history codes 331 and 553.it has the wandering idle so i removed the iac and cleaned.no difference.it also spits back when you try to give it gas going down the road but clears out if i floor it.i also did the seafoam and vacumn hose thing.no difference.i also changed the oxygen sensor

331 means tape deck disconnected

553 means crt memory reset

Edited by handmedownreatta (see edit history)
Link to comment
Share on other sites

When it dark enough out side or in you garage with light off.  open the hood and start it. See if you have any arcing from the plug wires to ground.  I would suspect the rear bank wires first. I you do not see any arcing then it may be bad coil pack, spark plug wire or spark plug. How old are the Wires and Spark plugs?

Link to comment
Share on other sites

let me start this over again.about a year ago it died and aaa towed it to my house.it sat eight months til i was brave enough to try to fix it.it had no spark so i bought a used coil pack from a 1994 bonneville to upgrade the ignition.it turned out to have one bad coil which i replaced with an acdelco coil.it hasn't run right since i installed the coil pack.i don't want to start buying parts that don't help.ive done that before.i replaced the oxygen sensor since it had never been replaced.i ohmed out the spark plug wires and cleaned the plugs.its currently getting 13 mpg and i have to keep it from stalling at stoplights.at 65 mph it constantly spits unless i let off of floor it.its fine at 80 on flat ground.on the upside the brakes still work great since i removed the abs light bulb.

Edited by handmedownreatta (see edit history)
Link to comment
Share on other sites

21 hours ago, handmedownreatta said:

let me start this over again.about a year ago it died and aaa towed it to my house.it sat eight months til i was brave enough to try to fix it.it had no spark so i bought a used coil pack from a 1994 bonneville to upgrade the ignition.it turned out to have one bad coil which i replaced with an acdelco coil.it hasn't run right since i installed the coil pack.i don't want to start buying parts that don't help.ive done that before.i replaced the oxygen sensor since it had never been replaced.i ohmed out the spark plug wires and cleaned the plugs.its currently getting 13 mpg and i have to keep it from stalling at stoplights.at 65 mph it constantly spits unless i let off of floor it.its fine at 80 on flat ground.on the upside the brakes still work great since i removed the abs light bulb.

 

 What you are describing is similar to what I had for an issue on the Red last summer. I got to my brother's house and tried to back up a slight incline and the car wouldn't do it. So I pulled forward as far as I could and took a running try at backing into the spot [on an incline]. Made it. Then about 3 hours when I left total failure with no restart. Replaced coil and ignition module [Delco unit] fired the car up and it ran like a top. Just today I put on 250 miles and never a hiccup.

 Just because you put a different one on doesn't mean the "new" one isn't bad.

 Do like Padgett; Buy two when you go to the yard. Put one on and drive it for a week or two. If it runs good put the other one on and drive it. If it works good leave it on and mark the other one as "tested good". Then when the latest one fails you know you have a known good one to use, and one less thing to check on a part of the ignition that doesn't throw codes.

 It's not a major investment, salvage yards sell them for less then $50.00

 On another note did you check the fuel pressure? 

Edited by DAVES89 (see edit history)
Link to comment
Share on other sites

I had an issue with random misfires under load. It was bad enough it kept the car from attending the Allentown  event.

After going over ignition related stuff 3 or 4 times with no solution and tins of frustration. I found the large loomed wire harness on the firewall was not tied up high but much lower, about mid way down, Near OX sensor. I pulled up the harness and tied it up high. Problem solved. I was getting inducted signals from the harness.

Link to comment
Share on other sites

Padget. I am not sure what part was affecting which part with the induction interference.. Nothing showed up on the Diagnosis or out of spec when driving and looking at the running sensor parameters. I think I have an old thread for misfire under load.  I really went over all ignition parts 4 times.  One thing though this issue started after a MAF failure. Replaced everything, swapping parts back and forth doing testing. I was so frustrated I think I might have put it up for sale at that time. Been running perfect since then.

  • Like 1
Link to comment
Share on other sites

On 5/7/2020 at 3:41 PM, DAVES89 said:

 

 What you are describing is similar to what I had for an issue on the Red last summer. I got to my brother's house and tried to back up a slight incline and the car wouldn't do it. So I pulled forward as far as I could and took a running try at backing into the spot [on an incline]. Made it. Then about 3 hours when I left total failure with no restart. Replaced coil and ignition module [Delco unit] fired the car up and it ran like a top. Just today I put on 250 miles and never a hiccup.

 Just because you put a different one on doesn't mean the "new" one isn't bad.

 Do like Padgett; Buy two when you go to the yard. Put one on and drive it for a week or two. If it runs good put the other one on and drive it. If it works good leave it on and mark the other one as "tested good". Then when the latest one fails you know you have a known good one to use, and one less thing to check on a part of the ignition that doesn't throw codes.

 It's not a major investment, salvage yards sell them for less then $50.00

 On another note did you check the fuel pressure? 

i was going to do that today but with pick a parts reduced hours i didn't make it. i'll try again tomorrow.i plan to get a iac too;

 

Link to comment
Share on other sites

  • 2 weeks later...
4 hours ago, handmedownreatta said:

what does it mean if it runs better?

Odds are there is either a leak causing the MAF to misreport actual flow or it is defective. Best to swap sensors if you have a spare. What is the reading at idle? We just swapped MAF's on my sons Reatta for a poor or non existent idle coupled with a new O2 sensor which cured his idle. In his case, he was getting an occasional MAF code.

Link to comment
Share on other sites

Had a similar problem recently.  Car would run rough and would die at idle with no codes.  After checking/replacing every part I could think of it turned out to be a bad cam (or was it the crank?  I get those two confused) sensor that hadn't been tightened properly and had gotten chewed up by the harmonic balancer.  New coil pack and ignition module helped too.

  • Like 1
Link to comment
Share on other sites

  • 1 month later...
On 5/9/2020 at 7:01 PM, handmedownreatta said:

its got a vacumn leak somewhere beneath the iac valve.

the vacumn leak turned out to be the hose between the air filter and throttle body had folded inward and was letting air in.i bought  a harbor freight fuel pressure guage today[couldn't find my old one].i found out that theres no fuel pressure with the key on.running it looked about thirty five pounds[i know too low]but the guage is POURING fuel.so i turned it off quickly.i used to hear the fuel pump run before i started it,but not til its running now.

Link to comment
Share on other sites

31 minutes ago, handmedownreatta said:

i found out that theres no fuel pressure with the key on.running it looked about thirty five pounds[i know too low]but the guage is POURING fuel.so i turned it off quickly.i used to hear the fuel pump run before i started it,but not til its running now.

 

Check the fuel pump relay. If it is bad the pump won't run when you turn the key on but it will start running (through a set of contacts in the oil pressure sending unit) after the engine has built some oil pressure. 

  • Like 1
Link to comment
Share on other sites

its running MUCH better now.two problems.bad fuel pump relay and when i went with the coil pack from the 94 bonneville i checked the output side of the coils and replaced one.since it still ran bad i bought another coil pack from a late nineties car.it ran better but not good.then i checked the input side of the coils from the first coil pack and found another bad coil.today i combined the three good coils from the second coil pack and the module from the first coil pack and instant improvement,it runs smooth and the mpg jumped from eleven to  seventeen.i only went about five miles.i will drive it more tomorrow.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

×
×
  • Create New...