D-Jet troubleshooting |
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D-Jet troubleshooting |
saigon71 |
Nov 13 2009, 03:36 PM
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#1
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Advanced Member Group: Members Posts: 2,000 Joined: 1-June 09 From: Dillsburg, PA Member No.: 10,428 Region Association: MidAtlantic Region |
Could use some ideas…
Background: Car sat idle in a garage for six years - 37K miles. Engine was free. 2.0 factory d-jet. I adjusted the valves, installed a new fuel filter, changed the oil & put some gas in it. It fired up but had a very high idle. Since then, I have done the following: -New plugs & wires -New distributor cap, points & condenser (rotor was clean) -New air filter -New alternator & voltage regulator - tested good -All new vacuum lines from AA -New intake runner gaskets and manifold to head gaskets -Tested all FI components except the brain. Replaced AAR and MPS with good used ones, bench tested each before installation. MPS holds 20 in HG and electrical tests were within limits. Replacement parts are compatible based on this site: http://members.rennlist.com/pbanders/djetp...tm#troubleshoot -Tested fuel pressure - dead on factory spec of 2.0 bar -Dwell well within specs -Set timing dead on at 27 degrees BTDC with distributor lines plugged and disty at full advance - TPS set according to the picture I found on this site - New plenum to intake runner gasket - New cold start valve gasket - Tested PCV Valve - Plenum inspected – no holes found - Throttle body removed & thoroughly cleaned At all ambient temps tested (50-70 degrees F), the car fires right up but stalls almost immediately…this happens twice. Tapping the throttle does not help. On the third start, the car stays running and idle varies between about 800-1200 RPM. After about 10 minutes, it settles in at about 950RPM or so. Besides this, the engine runs great, has plenty of power and pulls hard in all five gears. Is this as good as it gets or am I missing something. Thanks in advance. Bob |
r_towle |
Nov 13 2009, 10:27 PM
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#2
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Custom Member Group: Members Posts: 24,585 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
Here is a test.
Turn key on to run...turn off. Do this five times. Let fuel pump pressurize the system. Then start it. Does it stay running now? It could be a dying fuel pump that drains back when its not running and it takes a few times to pressurize the whole system. Also, try raising the fuel pressure. Rich |
saigon71 |
Nov 24 2009, 06:26 PM
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#3
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Advanced Member Group: Members Posts: 2,000 Joined: 1-June 09 From: Dillsburg, PA Member No.: 10,428 Region Association: MidAtlantic Region |
Here is a test. Turn key on to run...turn off. Do this five times. Let fuel pump pressurize the system. Then start it. Does it stay running now? It could be a dying fuel pump that drains back when its not running and it takes a few times to pressurize the whole system. Also, try raising the fuel pressure. Rich Rich: Performed your test. It had no effect. I raised the fuel pressure to 25 psi - no change. Bumped it up another 5psi to 30 - still the same. Is my fuel pump at fault? Anything else I can check? Thanks, Bob |
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