Cold starting issue
Thread Starter
|
6th Gear
Joined: Jan 2019
Posts: 13
Likes: 0
From: streetsboro
Cold starting issue
2001 ultra classic has trouble starting when cold once warm runs perfect but I have to turn throttle a little while hitting start button to get it to fire up, I dont hear hissing in the fuel tank lines, I replaced engine temp sensor, this is the Magnetti Marelli EFI the engine temp sensor didnt fix the issue battery is charged up. Tightened cables and cleaned any suggestions?
Seasoned HDF Member
Joined: Mar 2010
Posts: 38,688
Likes: 6,473
From: Honah Lee
His system is like a carb with a fuel sprayer on top.
No IAC
Go to YouTube and search for your system. There are some great blow by blow of each system function and how to adjust.
In a way, it's a very cool system and a million GM cars , Jeep's and what not had it.
Understand it, and it's great and simple.
My Jeep in the first FI after throttle body spray.
It has a IAC that looks just like my Harley's.
Has 300k on it.
No IAC
Go to YouTube and search for your system. There are some great blow by blow of each system function and how to adjust.
In a way, it's a very cool system and a million GM cars , Jeep's and what not had it.
Understand it, and it's great and simple.
My Jeep in the first FI after throttle body spray.
It has a IAC that looks just like my Harley's.
Has 300k on it.
Last edited by Jackie Paper; Jan 26, 2019 at 08:30 AM.
Seasoned HDF Member
Joined: May 2018
Posts: 5,814
Likes: 7,147
From: Las Vegas
Grand HDF Member
Joined: Jan 2012
Posts: 4,459
Likes: 2,900
From: Oklahoma
" It has a IAC that looks just like my Harley's.
Has 300k on it.
I would bet that your Jeep doesn't have crank case vapor being sucked past your IAC. For the OP, that enrichment sprayer and/or the IAC need to be cleaned. I have had this same problem on cars with over 100k on them, and it is usually a sticky IAC.
Has 300k on it.
I would bet that your Jeep doesn't have crank case vapor being sucked past your IAC. For the OP, that enrichment sprayer and/or the IAC need to be cleaned. I have had this same problem on cars with over 100k on them, and it is usually a sticky IAC.
Seasoned HDF Member
Joined: Mar 2010
Posts: 38,688
Likes: 6,473
From: Honah Lee
" It has a IAC that looks just like my Harley's.
Has 300k on it.
I would bet that your Jeep doesn't have crank case vapor being sucked past your IAC. For the OP, that enrichment sprayer and/or the IAC need to be cleaned. I have had this same problem on cars with over 100k on them, and it is usually a sticky IAC.
Has 300k on it.
I would bet that your Jeep doesn't have crank case vapor being sucked past your IAC. For the OP, that enrichment sprayer and/or the IAC need to be cleaned. I have had this same problem on cars with over 100k on them, and it is usually a sticky IAC.
Usually on cars, it's the back wash from the last spray of the FI system ever time you cut it off that is not drawn into engine is that black crud. It was caked on a 1/4 " in the ends of my manifold where it enters the side of the head.
Little got by air filter. No butterfly popet valves since there is not that brief fackflow like a Harley twin shareing single pin crank
Trending Topics
Thread Starter
|
6th Gear
Joined: Jan 2019
Posts: 13
Likes: 0
From: streetsboro
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
Harley-Davidson Fat Boy Becomes a Dark, Decepticon-Inspired Custom
Verdad Gallardo
6 Weirdest Harley-Davidsons Ever Sold to the Public
Verdad Gallardo
7 Times Harley-Davidson Chucked Tradition Out the Window
Verdad Gallardo
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Seasoned HDF Member
Joined: Mar 2010
Posts: 38,688
Likes: 6,473
From: Honah Lee
Could be quality of gas? Any chance of it being old or contaminated?
I had that problem once. Needed just a tad of throttle to start and idle. Was gas. Screwed around for a week with it. Mine however is FI.
Start and idle is a very lean and sensitive to issues.
A restricted fuel system will first affect idle on a FI unlike a carb since with a carb, it will be top in since takes little to fill fuel bowl
I had that problem once. Needed just a tad of throttle to start and idle. Was gas. Screwed around for a week with it. Mine however is FI.
Start and idle is a very lean and sensitive to issues.
A restricted fuel system will first affect idle on a FI unlike a carb since with a carb, it will be top in since takes little to fill fuel bowl
I did a little research for you, check out these links. It does sound like you have a fuel delivery problem, and I read these links and it sounds as if your MM EFI is junk, my conclusion.
https://www.google.com/url?sa=t&rct=...a_PmW55pUi1PZV
https://www.google.com/url?sa=t&rct=...9d2dhOw3-dDvT1
https://www.google.com/url?sa=t&rct=...a_PmW55pUi1PZV
https://www.google.com/url?sa=t&rct=...9d2dhOw3-dDvT1