 1.8 Questions for the masses |
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| rick 918-S |
 Sep 13 2021, 03:44 PM
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Hey nice rack! -Celette  Group: Members Posts: 20,817 Joined: 30-December 02 From: Now in Superior WI Member No.: 43 Region Association: Northstar Region 
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I was helping my old high school pal attempt to get a 1.8 running. The car is his daughters. She really wants to take it on her drivers test. May be even this week. We had some strange stuff occur.
The car was purchased at Auction. It had an engine fire due to a cracked clamp on the cold start valve. The fire consumed the center of the engine harness. Through the generosity of Betty and Clay they received a parts box at no charge. Thank you again you two! I came into the picture when they had everything installed and we attempting to get it running. Turned out they accidentally broke the inlet on the cold start. So I was lucky enough to source one from Jim Hoiland. Thank you Jim! So with this install it would crank and barely run. Fuel pressure was at 40ish PSI. My friend Lowell smoke tested the intake system. All was tight. Once we had it firing barely.. Lowell pulled the plug on the AFM and the car raced to life. Weird I know. Pulled the plugs and notice #3-#4 were wet with Gas. #2 was dry like it never got fuel and #1 looked normal. Lowell ordered a set of Injectors. We believe due to the process of elimination two of the injector were stuck open and one was stuck closed. Noid lighted all injectors that they are getting signal. Any thoughts on the reason the car kept running with the AFM unplugged? Lowell thought possibly the injector that were stuck one were being siphoned allowing the engine to keep running. |
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| Dave_Darling |
Sep 14 2021, 06:35 PM
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914 Idiot Group: Members Posts: 15,063 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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I remember an instance a number of years ago where a D-jet engine would run (at idle only) with the fuel pump unplugged, and die when it was plugged in.
Turns out that the CHT was unplugged, making the mixture super rich, but with just gravity-fed fuel pressure, the mixture was leaned out enough that it would actually run. I'm saying that you could have some basic problem that is masking the symptoms, so go back and start checking the basics first. --DD |
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| wonkipop |
Sep 15 2021, 02:49 AM
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#3
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Advanced Member Group: Members Posts: 4,667 Joined: 6-May 20 From: north antarctica Member No.: 24,231 Region Association: NineFourteenerVille
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QUOTE(Dave_Darling @ Sep 14 2021, 06:35 PM)  I remember an instance a number of years ago where a D-jet engine would run (at idle only) with the fuel pump unplugged, and die when it was plugged in. Turns out that the CHT was unplugged, making the mixture super rich, but with just gravity-fed fuel pressure, the mixture was leaned out enough that it would actually run. I'm saying that you could have some basic problem that is masking the symptoms, so go back and start checking the basics first. --DD see @rick 918-S other thread about the CHT on same car? the CHT is not plugged in. not that above is necessarily explaining the case here. but?! great bit of information DD. |
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Posts in this topic
rick 918-S 1.8 Questions for the masses Sep 13 2021, 03:44 PM
wonkipop i know that the engine will run on the cold start ... Sep 13 2021, 04:09 PM rick 918-S That is a thought. Possibly install a noid light w... Sep 13 2021, 04:53 PM
ndfrigi
That is a thought. Possibly install a noid light ... Sep 13 2021, 05:04 PM
wonkipop
That is a thought. Possibly install a noid light... Sep 13 2021, 05:13 PM ndfrigi deleted. not sure why double post. Sep 13 2021, 05:04 PM jim_hoyland @timothy_nd28
Perhaps he will chime in. He’s po... Sep 13 2021, 05:02 PM SteveL On the new injectors - did he order the SMP inject... Sep 13 2021, 06:18 PM JeffBowlsby
On the new injectors - did he order the SMP injec... Sep 13 2021, 06:34 PM SteveL
On the new injectors - did he order the SMP inje... Sep 13 2021, 06:37 PM rick 918-S
[quote name='JeffBowlsby' post='2945204' date='Se... Sep 14 2021, 06:17 AM ClayPerrine Rick,
If the injectors were stuck open, that woul... Sep 14 2021, 06:46 AM rick 918-S Thanks DD! Good recall. Kind of part of what s... Sep 15 2021, 06:05 AM timothy_nd28 The airflow meter keeps the fuel pump running afte... Sep 16 2021, 09:06 PM |
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