 Fuel Injection vs CARBS, Advise to my 1.8L |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
  |
| cbenitah |
 Sep 8 2005, 07:30 PM
Post
#1
|
|
Protected by the Swedish Maffia  Group: Members Posts: 848 Joined: 16-August 05 From: San Diego, CA Member No.: 4,597  |
So I'm wondering what the best way is here...
My 1.8L is acting a little bit funny when it comes to acceleration, it feels like all the power is gone. I can go from 1000 RPM's to 4000 without more increase in speed than maybe 10MPH in 1st gear.. and i IDLE at 1200 but thats when the engine is warm, otherwise its around 2-300.. Someone said its the fuel injection being bad from the begining, and that i should remove it and put Carbs on it.. Anyone has an opinion about this question? /the guy that have to drive in the slow lane with rest of the seniors (IMG:http://www.914world.com/bbs2/html/emoticons/ar15.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/driving.gif) |
   |
 
|
| lapuwali |
Sep 8 2005, 07:44 PM
Post
#2
|
|
Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743  |
There are very strong opinions on this subject, and if you do a search, you'll read and re-read all of them...
|
|
|
|
| TravisNeff |
Sep 8 2005, 07:48 PM
Post
#3
|
|
914 Guru Group: Members Posts: 5,082 Joined: 20-March 03 From: Mesa, AZ Member No.: 447 Region Association: Southwest Region 
|
Let me get this straight. Your car, when acellerating fom 1K RPM to 4K RPM, is only gaining you 10MPH?? Sounds like your clutch is not adjusted correctly or it is ready to give out on you.
|
|
|
|
| Twystd1 |
Sep 8 2005, 07:51 PM
Post
#4
|
|
You don't want to know... really..... Group: Members Posts: 2,514 Joined: 12-September 04 From: Newport Beach, California Member No.: 2,743 |
My first impulse is to suggest you Turbo your 1.8...
But then again... I ain't Aaron (IMG:http://www.914world.com/bbs2/html/emoticons/tongue.gif) Me thinks the better questions for you to answer is: Are you mechanicly inclined enough to attempt to repair this your self? How much money have ya got that you want to throw at this problem? Do ya wanna racer .... or a gas miser? (Cause you can use the carbs later for a performance build) Me thinks this will help US answer you... Cheers, Twystd1 |
|
|
|
| cbenitah |
Sep 8 2005, 08:00 PM
Post
#5
|
||
|
Protected by the Swedish Maffia Group: Members Posts: 848 Joined: 16-August 05 From: San Diego, CA Member No.: 4,597 |
Well, when the car is cool its ok, then it has a normal acceleration, but when it gets up to speed its like its jumping forward.. sometimes it gets more (normal) power but on the freeway im lost all the way to the right in 60-65.. |
||
|
|
|
||
| cbenitah |
Sep 8 2005, 08:03 PM
Post
#6
|
||
|
Protected by the Swedish Maffia Group: Members Posts: 848 Joined: 16-August 05 From: San Diego, CA Member No.: 4,597 |
Well, the $ is just this.. I could do the rebuilt for whatever $$$K that would cost. But i dont see the future in THIS engine and I would rather save a couple of months more or so the get a 6 convertion done! So all I want now is to have this 1.8L as my daily driver and be as smooth as possible.. carbs would be what $1500 to get it installed.. and a 6 convertion would be?? above 10K |
||
|
|
|
||
| lapuwali |
Sep 8 2005, 08:09 PM
Post
#7
|
||
|
Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743 |
And fixing the L-Jet would likely be under $100... If you can't or won't do this yourself, find a mechanic who's worked on any European cars from the 80s, and you'll probably find someone who can fix L-Jet. If you'd like to fix this yourself, get a book on Bosch fuel injection (there are several, but Charles Probst's book is best) and flip to the L-Jet troubleshooting section. You'll very likely have the problem fixed in a weekend. |
||
|
|
|
||
| cbenitah |
Sep 8 2005, 08:14 PM
Post
#8
|
||
|
Protected by the Swedish Maffia Group: Members Posts: 848 Joined: 16-August 05 From: San Diego, CA Member No.: 4,597 |
Is it worth fixing the L-Jet though? My mechanic said its a bad one from the begining etc.. and that either a convertion or put carbs on it would be the smart deal.. i dunno.. Just want it to run for now, which it does much to your guys's help! |
||
|
|
|
||
| Trekkor |
Sep 8 2005, 08:15 PM
Post
#9
|
|
I do things... Group: Members Posts: 7,809 Joined: 2-December 03 From: Napa, Ca Member No.: 1,413 Region Association: Northern California |
Must..Fight...Urge...to..Post.... (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif)
KT I'll only tell you what I think if you ask me... (IMG:http://www.914world.com/bbs2/html/emoticons/ph34r.gif) |
|
|
|
| ClayPerrine |
Sep 8 2005, 08:29 PM
Post
#10
|
||
|
Life's been good to me so far..... Group: Admin Posts: 15,519 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille
|
You need to get a different "mechanic", cause the guy you have now is a neanderthal that knows nothing about Fuel Injection. Tell him to stick with chebbies. The L-Jet system is the most popular fuel injection (if you base the claim on sheer numbers of cars running it). It was available on multiple European cars, and all the fuel injected Japanese cars of the 80s and 90s used some variation of L-jet. It was the basis for the Motronic system, which is still in use by Bosch on the current 997. Check the tube between the air flow meter and the throttle body for cracks. If you have any air leaks after the air flow meter, the mixture will lean out and you motor will run terribly. |
||
|
|
|
||
| cbenitah |
Sep 8 2005, 08:45 PM
Post
#11
|
||
|
Protected by the Swedish Maffia Group: Members Posts: 848 Joined: 16-August 05 From: San Diego, CA Member No.: 4,597 |
Well the thing is that I do trust him, he used to work at the volk. factory in germany. and has been a 911 race car mechanic/driver for several years... I'll get the book and do some reading about it for now! |
||
|
|
|
||
| JeffBowlsby |
Sep 8 2005, 09:23 PM
Post
#12
|
||
|
914 Wiring Harnesses Group: Members Posts: 8,533 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
|
He has nothing to lose/potentially everything to gain by suggesting that huh... |
||
 |
|
||
| cbenitah |
Sep 8 2005, 09:42 PM
Post
#13
|
||
|
Protected by the Swedish Maffia Group: Members Posts: 848 Joined: 16-August 05 From: San Diego, CA Member No.: 4,597 |
I am aware of just that! That is why I'm looking for people around me... San Diego... That can show me help me etc to become the master mechanic i was born to be (IMG:http://www.914world.com/bbs2/html/emoticons/welder.gif) no but being able to meet other teeners is worth a lot to me! |
||
|
|
|
||
| double-a |
Sep 8 2005, 10:11 PM
Post
#14
|
|
Senior Member Group: Members Posts: 987 Joined: 15-September 03 From: vancouver, wa, usa Member No.: 1,162 Region Association: Pacific Northwest |
if your injection is at fault, i vote fix it. last december i bought a car that hadn't been driven for 20 years, original 1.8 engine. long story short, we replaced some injection hose, seals on the oil filler neck, and other bits, and since then i've put maybe 2500 miles on it. no problems, starts every time and gets close to 20mpg. not bad for an old fossil, dug out of a garage and dusted off.
if you're going to troubleshoot l-jet, i highly recommend this site: manuals.type4.org, it was of great use in the process of elimination. ~a |
|
|
|
| TravisNeff |
Sep 9 2005, 01:02 AM
Post
#15
|
|
914 Guru Group: Members Posts: 5,082 Joined: 20-March 03 From: Mesa, AZ Member No.: 447 Region Association: Southwest Region
|
Was this happening before your "Clutch Pop" episode? If not, I bet you might have got the clutch cable too tight.
|
|
|
|
| bd1308 |
Sep 9 2005, 06:23 AM
Post
#16
|
|
Sir Post-a-lot Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501 |
i did the same thing....then i burned myself real bad from the HEs trying to change the clutch cable tightness...
|
|
|
|
| redshift |
Sep 9 2005, 06:50 AM
Post
#17
|
||
|
Bless the Hell out of you! Group: Members Posts: 10,926 Joined: 29-June 03 Member No.: 869 |
Here KT... YOUR MECHANIC IS A DUMBASS. M |
||
|
|
|
||
| DNHunt |
Sep 9 2005, 06:58 AM
Post
#18
|
|
914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
Learn everything you can about your car (read and research). Apply some common sense cause you are as clever as any of us. Follow a logical plan of problem shooting. Only change 1 thing at a time. Be PATIENT (Britt wait for things to cool off) Argh!
As long as you are prepared don't be afraid to try to fix the FI. Dave |
|
|
|
| tat2dphreak |
Sep 9 2005, 07:36 AM
Post
#19
|
||
|
stoya, stoya, stoya Group: Benefactors Posts: 8,797 Joined: 6-June 03 From: Wylie, TX Member No.: 792 Region Association: Southwest Region |
a stock car is best with FI, it's cheaper to fix the FI than convert to carbs(unless someone gave you a free set of webers) fix the FI... IF that is even the issue... I would do more diagnosis and be sure that is the problem... check compression, timing, plugs, all the OTHER things that make a car run too... don't just BET on FI being the issue...
oh yea:
(IMG:http://www.914world.com/bbs2/html/emoticons/agree.gif) |
||
|
|
|
||
| Cap'n Krusty |
Sep 9 2005, 08:48 AM
Post
#20
|
||||
|
Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
Find another "mechanic", a real one. This guy sounds like an ignorant bozo who wants your money, any way he can get it, and this seems like a good way. That's $1500 less in the conversion fund. A lot of cars used this system for more than 20 years, including 280Zs, 928s, and many other performance cars. The Cap'n |
||||
|
|
|
||||
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 9th June 2024 - 08:24 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.