 Thinking of carbing a 1.7L from 1971 car, Open to any suggestions |
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| Hawk |
 Dec 3 2004, 10:22 PM
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#1
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Member  Group: Members Posts: 351 Joined: 31-December 02 From: Ann Arbor, Michigan Member No.: 57  |
I have a new to me fairly rust free 1971 914 w/ 1.7L that was finicky to start with and now impossible to get started. Ive replaced vacuum hoses, engine temp sensor, spark plugs, points, rotor , fuel pump and I'm fed up now and thinking of converting to carburators. I have no experience here and am seeking opinions on what to do, where to get parts and mostly, how to do the job without costing more than the car is worth. OK gurus, please weigh in. Thanks.
-Richard |
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Replies(1 - 16)
| dlo914 |
Dec 3 2004, 10:24 PM
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#2
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Whatchu' lookin' at?!?! Group: Members Posts: 3,432 Joined: 6-September 04 From: San Gabriel, CA Member No.: 2,697 |
getting any spark at all 4 plugs?
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| skline |
Dec 3 2004, 10:50 PM
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#3
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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 |
If it is a stock 1.7 with FI then just pick up one of those single progressive carb setups and drive it till you need to rebuild. It will get you on the road and have about the same power without changing the cam.
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| Rhodes71/914 |
Dec 3 2004, 10:53 PM
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#4
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Glacier Group: Members Posts: 1,374 Joined: 8-August 04 From: End of the Road, Alaska Member No.: 2,482 |
I would try to troubleshoot the djet first, spark is a good start as mentioned above. Then pull the injectors one at a time and place them in a glass jar or something similar, remove wire from coil to dist. and make sure they are shooting fuel.
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| mattillac |
Dec 3 2004, 11:13 PM
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#5
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robots! Group: Members Posts: 536 Joined: 27-October 04 From: vallejo,ca Member No.: 3,020 |
check spark at plugs. check power to fuel pump. check crap in gas tank blocking lines. check fi relays. check fuses. check compression. check all fi connections. check battery. check old fuel filter. oh fuck it, just buy a toyota. (IMG:style_emoticons/default/lol2.gif)
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| skline |
Dec 3 2004, 11:26 PM
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#6
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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 |
Ok, Well, if you want to troubleshoot the FI, dont foget to check the FI points in the distributor. They are underneath the ingition points. They come out the side of the dizzy.
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| mattillac |
Dec 4 2004, 12:07 AM
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#7
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robots! Group: Members Posts: 536 Joined: 27-October 04 From: vallejo,ca Member No.: 3,020 |
what happens when you turn the key? any noises? no noise? does anything happen at all? (IMG:style_emoticons/default/confused24.gif)
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| DJsRepS |
Dec 4 2004, 12:43 AM
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#8
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Member Group: Members Posts: 431 Joined: 4-November 04 From: Sarasota Florida Member No.: 3,060 |
Keep the Djet. There is enough good help on this board to figure it out. Check the grounds on the block under the intake. Pull dist lube and clean the FI points then ohm them with meter. Check fuel pressure. Pull all wires off distrubitor (safty) pull injectors leaving line's and wire's on place shot glass juice glass pill botel under each injector ask someone to crank it over look for even spray patern apx same ammount of fuel in ea jar crack's and last dribbles when not turning over but turning on and off key to activate pump only. If you determine you have fuel injecting and have fire to the plug its going to run. Do vaccume check on the MPS (manifold pressure sensor). With ign on but not running opening the throdle you should hear the injectors ticking sound (shows ECU and TPS are talking to each other) Make sure valves are in adjustment, point dwell first then timing light, check for vacume leaks loose hoses etc...
Djet on a stock 1.7 is great. Carb on that 1.7 no real performance boost with out a carb orientated camshaft and head work. Main troubles of the Djet a. Trigger points b. MPS wont hold vacuume c. FI harness, terminals on harness and ground's on the harness. The ECU (brain box) rarely gives trouble. Most of the time the trouble can be fixed with good ohm meter (digital volt meter) Save the $$ save the Djet. |
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| SirAndy |
Dec 4 2004, 12:46 AM
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#9
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Resident German Group: Admin Posts: 41,688 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(Hawk @ Dec 3 2004, 08:22 PM) and now impossible to get started. that does not sound like a FI problem and i'm afraid that you'll have the same/similar problem after converting ... check the relays and fuses on the relay board. they trigger the fuel pump and the FI brain. (IMG:style_emoticons/default/cool.gif) Andy |
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| mattillac |
Dec 4 2004, 12:50 AM
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#10
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robots! Group: Members Posts: 536 Joined: 27-October 04 From: vallejo,ca Member No.: 3,020 |
(IMG:style_emoticons/default/agree.gif) after replacing a few questionable parts on my djet, i found out that it runs great and runs consistently.
still have to flow test my injectors, though. but i think everything else is squared away. my first suggestion would be to replace all vacuum hoses with new german ones, and all fi related gaskets with new ones. you can't really trouble shoot alot of fi problems if you have vacuum leaks. |
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| dlo914 |
Dec 4 2004, 01:30 AM
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#11
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Whatchu' lookin' at?!?! Group: Members Posts: 3,432 Joined: 6-September 04 From: San Gabriel, CA Member No.: 2,697 |
QUOTE(mattillac @ Dec 3 2004, 09:13 PM) check spark at plugs. check power to fuel pump. check crap in gas tank blocking lines. check fi relays. check fuses. check compression. check all fi connections. check battery. check old fuel filter. oh fuck it, just buy a toyota. (IMG:style_emoticons/default/lol2.gif) ive also got a toyota...helps to relieve the stress when the 14 is being a bit (IMG:style_emoticons/default/ohmy.gif) tempermental...BUT i still LOVE the 14 (IMG:style_emoticons/default/wub.gif) |
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| mattillac |
Dec 4 2004, 01:39 AM
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#12
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robots! Group: Members Posts: 536 Joined: 27-October 04 From: vallejo,ca Member No.: 3,020 |
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| dlo914 |
Dec 4 2004, 01:41 AM
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#13
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Whatchu' lookin' at?!?! Group: Members Posts: 3,432 Joined: 6-September 04 From: San Gabriel, CA Member No.: 2,697 |
THANK YOU JEBUS or BUDDAH that im not alone!!!
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| ejm |
Dec 4 2004, 06:18 AM
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#14
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I can see the light at the end of the tunnel Group: Members Posts: 2,695 Joined: 3-February 03 From: Massachusetts Member No.: 224 Region Association: None |
QUOTE(Hawk @ Dec 3 2004, 08:22 PM) that was finicky to start with and now impossible to get started. Andy wrote: QUOTE that does not sound like a FI problem and i'm afraid that you'll have the same/similar problem after converting ... (IMG:style_emoticons/default/agree.gif) I bought my '76 not running and with the same problem according to the PO's widow. He had replaced everything in the igniton and FI including new ECU, MPS and fuel pump. The car had a bad ignition switch, no power to the coil when cranking. Your problem is most likely just as simple....keep the FI Is this the car I talked to Gary about at the MWC? |
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| TheCabinetmaker |
Dec 4 2004, 08:26 AM
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#15
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I drive my car everyday Group: Members Posts: 8,304 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
fix the djet. You'll be miles and smiles ahead.
Oh yeah, did I mention that I hate carbs? (IMG:style_emoticons/default/smoke.gif) |
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| Bleyseng |
Dec 4 2004, 10:18 AM
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#16
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Aircooled Baby! Group: Members Posts: 13,035 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
I agree with Ed, first check to see if you have good spark while cranking. Pull a spark plug wire and insert a spare plug and ground it good against the engine. Have a friend crank over the engine while looking at the plug. Does it have a nice brite blue spark? If not, check all grounds, tranny ground strap, power to the coil when cranking.
If this checks out then check to see if you have fuel by putting the injectors in the glasses. Car should idle atleast if you have fuel and spark. Geoff |
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| Hawk |
Dec 5 2004, 12:41 PM
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#17
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Member Group: Members Posts: 351 Joined: 31-December 02 From: Ann Arbor, Michigan Member No.: 57 |
Busy weekend, sorry about getting back to you for the throughtful replies. OK, the FI stays (for now).
BS chairman and I have done much of what you suggested over the previous 3 months (yes, Ed its the same car we spoke of at the MWC over breakfast) but we will re-do and double check steps in a more disciplined fashion. Must have overlooked something. Will even redo the blasted head temp sensor in case we broke that line putting it in. Will keep you posted. Have a great week. |
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