Missing/rough Ilde

[jpspeedy]

two weeks ago car started running so roughand missing I wasn't sure it I would make the 2 blocks to home, got home parked it.

the next day started up and ran fine for a week, then it happened again made it home and next day ran fine. Now on thursday it happened and still will not run correctly. just got the free scan on saturday and I not sure what if anything it tell me.

The car is 89 SE with 51,000 miles I put new spark plugs in 2 months ago and did the fuel filter in May,

today I changed the o2 sensor. any help thanks jim price

[Malc Holmes]

If you freescan log is not too big why not post it as an attachement and let the combined brains of LEW take a look. Dermot is in S Korea at the mo, but if no one else casn make sense of it I am sure he could upon his return.

Malc Holmes

[jpspeedy]

freescan report attached

[Artie]

freescan report attached

Jim,

Give it another try. Is the check engine light on?

Artie

[jpspeedy]

Jim,

Give it another try. Is the check engine light on?

Artie

no the check engine light is not on. jp

[Artie]

no the check engine light is not on. jp

Did you reset the ecm? Pull the negative battery cable for a few minutes then reconnect it. Then try it out. Have you done a compression check on the engine?

Art

[jpspeedy]

Did you reset the ecm? Pull the negative battery cable for a few minutes then reconnect it. Then try it out. Have you done a compression check on the engine?

Art

yes I reset ecm and pull the negative battery. this did not help. Did not do compression check. why should I ? The problem was Intermittent 2 times with weeks between until thursday. I was thinking fuel pressure maybe? pump going bad? thanks jp

[superdavelotus]

Is there anything else minor that you have forgotten to mention? Was the car parked outside, was it wet? Had you just cleaned it? It is after you've left it standing or does it happen when it's warm (hot start)? Have you got A/C, was this on?

We need as much info as possible as it could be anything, fuel pump, vacuum hoses split, vaccum pump, various sensors, cat falling apart and blocking from time to time etc etc.

[jpspeedy]

two weeks ago car started running so roughand missing I wasn't sure it I would make the 2 blocks to home, got home parked it.

the next day started up and ran fine for a week, then it happened again made it home and next day ran fine. Now on thursday it happened and still will not run correctly. just got the free scan on saturday and I not sure what if anything it tell me.

The car is 89 SE with 51,000 miles I put new spark plugs in 2 months ago and did the fuel filter in May,

today I changed the o2 sensor. any help thanks jim price

jp here again, when I pull plug wire 1 and 4 there is no change in motor, but plug wire both have strong spark off, looks like I am not get any fuel to 1 and 4 what should i do next ? thanks

[fjmuurling]

Injectors 1&4 are (electrically) connected in parallel as are 2&3. So if cylinder 1 and 4 are not getting fuel it looks like a wiring problem or a faulty driver circuit in the ECM. Check if the injectors are getting a signal. I saw Artie mentioning a tester in one of the other posts here.

Freek

[jpspeedy]

Injectors 1&4 are (electrically) connected in parallel as are 2&3. So if cylinder 1 and 4 are not getting fuel it looks like a wiring problem or a faulty driver circuit in the ECM. Check if the injectors are getting a signal. I saw Artie mentioning a tester in one of the other posts here.

Freek

thanks alot I got hold of Artie, the tester I needed was a Noid tester yes (Noid) I got it at Napa auto parts for $18.00 us. Turns out I am not get the signal for the injectors 1 &4 to open. Looks like I have a short or bad ECM. Anyhow it now going to the local Lotus dealer only about 30 miles away. Most likely lots of money but they claim it will be done 2 days, they overnight all their parts from Lotus. thanks jim

[jpspeedy]

thanks alot I got hold of Artie, the tester I needed was a Noid tester yes (Noid) I got it at Napa auto parts for $18.00 us. Turns out I am not get the signal for the injectors 1 &4 to open. Looks like I have a short or bad ECM. Anyhow it now going to the local Lotus dealer only about 30 miles away. Most likely lots of money but they claim it will be done 2 days, they overnight all their parts from Lotus. thanks jim

Artie , I got a new ecm and it did not help. I have just notice if I unplug injector 1 then injector 4 works any ideals? ps I see your in Kansas City I am in St Louis. jpspeedy

[Artie]

Artie , I got a new ecm and it did not help. I have just notice if I unplug injector 1 then injector 4 works any ideals? ps I see your in Kansas City I am in St Louis. jpspeedy

Cool, went to high school in ST. Charles. I'm not sure why it would do that unless the resistance is too high when both are plugged in. Maybe one of the injectors is faulty. Try switching around injector 2 or 3 with one then plug 1 and 4 in to see if the two of them fire. If that's the case, I have a set of stock injectors I'm not using.

Artie

[jpspeedy]

Cool, went to high school in ST. Charles. I'm not sure why it would do that unless the resistance is too high when both are plugged in. Maybe one of the injectors is faulty. Try switching around injector 2 or 3 with one then plug 1 and 4 in to see if the two of them fire. If that's the case, I have a set of stock injectors I'm not using.

Artie

A big thanks to Artie and Dermot, I have her fixed, it was a bad injector #4, The car is running better than ever. thanks jpspeedy

[Artie]

A big thanks to Artie and Dermot, I have her fixed, it was a bad injector #4, The car is running better than ever. thanks jpspeedy

Awesome! Glad to hear she's back to normal! Any upgrades planned? Are you going to go to LOG in Colorado?

Artie

[jpspeedy]

two weeks ago car started running so roughand missing I wasn't sure it I would make the 2 blocks to home, got home parked it.

the next day started up and ran fine for a week, then it happened again made it home and next day ran fine. Now on thursday it happened and still will not run correctly. just got the free scan on saturday and I not sure what if anything it tell me.

The car is 89 SE with 51,000 miles I put new spark plugs in 2 months ago and did the fuel filter in May,

today I changed the o2 sensor. any help thanks jim price

Now the low coolant light will not go out. Now I had to discontect the hoses to the chargecooler and I did add coolant to that system. question does the low coolant light come on when either system is low ( radiator or chargecooler ) ? thanks jp