Jump to content

Rough Running when cold


Recommended Posts

Hi everyone,my 1972 6PI fires around 3rd attempt but needs a bit of coaxing with choke/throttle to keep running.(I use fuel additive) After about 2 mins runs fine.It has been like that since I bought it 4 years ago and assumed it was part of the fun of ownership. I took it to local garage for MOT and a tune up they told me it was not how it should be and might be a problem with injectors or cold start?. I think they were not to sure about PI system and glad they left well alone. Any ideas or reccomendations to expert garages within 25 miles of Milton Keynes would be welcomed.

Link to post
Share on other sites

Sounds as though the fast idle cam needs adjusting, or maybe the cable is missing. Your choke (sorry, fuel enrichment device) cable should split into two. One goes to the metering unit and one to the fast idle cam under the throttle bodies.

Link to post
Share on other sites

No dont think its a problem. The choke and fast idle are needed till the engine gets (and other bits) warm up, and a few minutes is around the same as my previous 3 TR6's and now TR5. If it runs fine when its warm leave well alone. Dosent sound like the garage is all that up to speed with 40year old cars. Ist all done with sensors and electronics on modern cars so you dont notice its fuel enrichment and fast idle....

 

Relax and enjoy

 

Robin

Link to post
Share on other sites

You'll probably need the attachments for the end of the cable as well. Check to see whether they were removed. The fast idle used to be disconnected, often with the cable shortened, as a damage reduction measure to deal with the likelihood that all the oil would have drained back out of the filter into the sump. Presumably it was thought to reduce the likelihood of fast unlubricated running. With the substitute spin-on filters, fitted so they don't drain back, the problem disappears.

 

My only problem is that I cannot get a sufficient purchase on the back of the choke/enrichment fixing to undo it from the console and I'm too lazy to take the whole thing out. So I have yet to get around to fitting my new double cable and reinstating my fast idle.

 

My MOT garage has never complained about the cold rough running. But some of them are old enough to remember manual chokes from new.

 

Anthony

Link to post
Share on other sites

Spot on Pete choke has only 1 cable going to metering unit other appears to have been cut off I will order correct choke cable. Thanks all for your input.

Mick

 

Thats going to hurt as the twin cables are expensive :(

Stuart.

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...

Important Information

Please familiarise yourself with our Terms and Conditions. By using this site, you agree to the following: Terms of Use.