73 2.0, wont start when warm |
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73 2.0, wont start when warm |
drgchapman |
Mar 7 2005, 11:32 PM
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#1
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Current Stable Group: NoClassifiedAccess Posts: 922 Joined: 20-September 04 From: Portland, OR Member No.: 2,789 Region Association: Pacific Northwest |
We have a 73 2.0, signal orange,box stock, rebuilt motor this winter. Pretty clean little car. We are second owners. Car has run great until this week.......OK, I've heard of the vapor lock warm start thing. But we live in Portland!...and it's February! For the past three days the temp has been in the 60's, hit 70 today. Saturday, drove teener to lunch, had lunch, starts after much cajoling. Then today, strands Pamela in Beaverton for about an hour. She finally gets it started. Car tuns over just fine, won't fire. Spit, cough, whirrr.......
Do we have a vapor problem? In Portland, less than 70 degrees? Gary Attached image(s) |
Trekkor |
Mar 7 2005, 11:45 PM
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#2
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I do things... Group: Members Posts: 7,809 Joined: 2-December 03 From: Napa, Ca Member No.: 1,413 Region Association: Northern California |
No whir, huh?
You turn the key on and no fuel pump momentary hum? KT |
SirAndy |
Mar 7 2005, 11:54 PM
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#3
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Resident German Group: Admin Posts: 41,640 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
no. most certainly not ... sounds more like a electrical problem to me. take one injector out and hold it over a jar while you crank it over. if it sprays, yer fuel delivery is fine. next (after the injector is back in place!) take out a sparkplug and crank her over and see if you got spark. obviously, all this while she's warm and not starting. check the wire and connectors to the CHT. make sure there's nothing lose there. make sure the CHT itself is not lose. post a pic of your engine comp! (IMG:http://www.914world.com/bbs2/html/emoticons/cool.gif) Andy |
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drgchapman |
Mar 7 2005, 11:55 PM
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#4
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Current Stable Group: NoClassifiedAccess Posts: 922 Joined: 20-September 04 From: Portland, OR Member No.: 2,789 Region Association: Pacific Northwest |
Yeah, the fuel pump runs when key turned on for about 2-3 seconds. Starts great cold, runs a little rough until warmed up.
Check your tire thread, trading some experience here.....this is cool! (IMG:http://www.914world.com/bbs2/html/emoticons/smilie_pokal.gif) Gary |
gregrobbins |
Mar 7 2005, 11:55 PM
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#5
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Member: Team NARP Group: Members Posts: 1,515 Joined: 23-March 04 From: Arizona Member No.: 1,844 Region Association: Southwest Region |
I am having a similar problem with my '73 1.7L. Here is some information I got from Slits
Also, here is a link to my post from Saturday Link to other posts. |
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Rhodes71/914 |
Mar 8 2005, 12:08 AM
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#6
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Glacier Group: Members Posts: 1,374 Joined: 8-August 04 From: End of the Road, Alaska Member No.: 2,482 |
Thought I had this problem solved with an ignition switch change out. But yesterday it was pretty warm on this side of the mountains (for March anyway) and I drove it pretty hard for about 20 min. Got home shut it off, tried to start about 5 min later and same symptoms your talking about. Turns over fine, I like the low voltage to the coil idea, think I will check that next time it happens.
I think a push start will work in some cases in a pinch if you can't wait. I think I waited about 30 min and it started right up. |
skline |
Mar 8 2005, 01:12 AM
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#7
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Born to Drive Group: Members Posts: 7,910 Joined: 26-December 02 From: Costa Mesa, CA Member No.: 17 Region Association: Southern California |
Wow, I cant believe Slits didnt tell you how to fix it. I had this same problem when we went on the baja run. It was the head temp sensor. He knew it right off the bat. Never had the problem again.
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Rhodes71/914 |
Mar 8 2005, 01:33 AM
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#8
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Glacier Group: Members Posts: 1,374 Joined: 8-August 04 From: End of the Road, Alaska Member No.: 2,482 |
Why does it always come back to the CHT sensor on the FI system. Mine is new but that doesn't really mean anything. |
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Cap'n Krusty |
Mar 8 2005, 01:48 AM
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#9
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
The CHT sensor is out of the circuit once the engine is at operating temps, as long as it provides a ground. Over the 33 years in the business, I may have sold 10, and some of those were on complete rebuilds, just 'cause I could sell 'em. New 2 litre cars required a steady half throttle to start warm. An "electronic lie", we were told at school. The ECU, simple as it is, couldn't prioritize the inputs, and wouldn't provide the necessary mixture to fire. Longish crank times were the norm. The Cap'n
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drgchapman |
Mar 8 2005, 09:04 AM
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#10
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Current Stable Group: NoClassifiedAccess Posts: 922 Joined: 20-September 04 From: Portland, OR Member No.: 2,789 Region Association: Pacific Northwest |
Thanks for the input guys. Won't be able to apply for a couple of weeks, as we are out of town. I'll try the coil first, then the CHT?
Gary |
SLITS |
Mar 8 2005, 01:56 PM
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#11
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None |
Now with all of this said, I was having a conversation with the owner of Fuel Injection Corporation, who stated he cut his teeth on D-Jet and was able to diagnose any problem, yada yada yada....anyway,
He said that if the CHT was suspect to take a paper clip and hook it inline with the CHT (I assume this means you have a good electrical circuit). This must emulate the resistance it is supposed to give and it will solve the problem. No, I haven't had an opportunity to try it yet (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif) PS: he didn't state what size paper clip. |
Jeffs9146 |
Mar 8 2005, 02:31 PM
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#12
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Ski Bum Group: Members Posts: 4,062 Joined: 10-January 03 From: Discovery Bay, Ca Member No.: 128 |
My threads on the CHT were messed up and that would happen every time it warmed up! I repaired the threads and put a new CHT and it ran like a champ!! Start with that then check the coil! Jeff |
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mikerose |
Mar 8 2005, 02:41 PM
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#13
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Happy to be back Group: Members Posts: 657 Joined: 31-December 02 From: Pittsburg,ca Member No.: 60 Region Association: None |
I had a 1.8 that from time to time this would happen. It drove me nut's then one day mueller came over and we went over everthing and l that's when we found the bugger (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)
Rember mueller? just the CHT all this time (IMG:http://www.914world.com/bbs2/html/emoticons/ar15.gif) Mike (IMG:http://www.914world.com/bbs2/html/emoticons/cool_shades.gif) |
drgchapman |
Mar 8 2005, 03:02 PM
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#14
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Current Stable Group: NoClassifiedAccess Posts: 922 Joined: 20-September 04 From: Portland, OR Member No.: 2,789 Region Association: Pacific Northwest |
OK I"ll try the CHT first then the coil.
Thanks to all of you! See ya in about three weeks. Gary out of country |
skline |
Mar 8 2005, 03:11 PM
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#15
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Born to Drive Group: Members Posts: 7,910 Joined: 26-December 02 From: Costa Mesa, CA Member No.: 17 Region Association: Southern California |
Probably a 4 or 5 amp. (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) |
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Rhodes71/914 |
Mar 12 2005, 04:42 PM
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#16
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Glacier Group: Members Posts: 1,374 Joined: 8-August 04 From: End of the Road, Alaska Member No.: 2,482 |
Could the points in the dizzy have an affect when starting a warm engine?
Mine did not have enough gap, I've since changed the gap so my dwell is correct and have not had a warm start problem since. |
Bruce Allert |
Mar 12 2005, 05:01 PM
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#17
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Hellions asleep Group: Members Posts: 3,289 Joined: 19-March 03 From: Eagle Creek, Orygun Member No.: 441 Region Association: Pacific Northwest |
inline from the CHT to what? ........b |
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redshift |
Mar 12 2005, 05:31 PM
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#18
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Bless the Hell out of you! Group: Members Posts: 10,926 Joined: 29-June 03 Member No.: 869 |
Wire...
------male connector-paperclip-female connector------CHT. M |
anthony |
Mar 12 2005, 05:47 PM
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#19
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2270 club Group: Benefactors Posts: 3,107 Joined: 1-February 03 From: SF Bay Area, CA Member No.: 218 |
Gary, when the car won't start, is the starter turning the engine over? Or, is it "click" and the starter is dead?
If the starter is turning over try what the Captain said and give it more than half throttle. The manual for my '74 2.0 actually said to put the accelerator to the floor when starting hot. If it's just "click" and the starter doesn't turn over then it's probably an old starter or any of the other probable causes (ignition switch, cht, etc.). Installing a relay kit to the starter might also help. Attached image(s) |
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