QuestionI have 4 questions.
1. Whenever i drive this truck it fires up with no problem. if i go for a short drive and then let it sit for a good 30-45 minutes it will crank but wont fire up. I have spark changed spark plugs with a full tune up. i tried spraying some starting fluid into injectors and the car will turn over but will not stay on. If i let it sit for a few hours or over night the truck will fire up with no problems. This is an on and off thing. Would this be a bad fuel pump?
2. ever since i bought this truck it has a good 200,000 miles on it and its still runing really good but i noticed the oil pressure was at 0psi. when i get an oil change now i add a bottle of lucas oil stabalizer into it, ever since then ive been getting perfect oil pressure when starting the truck but when i drive the pressure flip flops from 0-30 what can be the problem?
3. when i start the truck it runs great. when the oil heats up and thins out i get a pretty good knock goin on in the engine what can this be?
4. should i consider an engine swap for a rebuilt 350 for $1900 2 year warranty? its an option im determining.
AnswerHi Ayal,
Is that $1900 installed? If not, too much. You can get that motor for $900 with a warranty.
1. More likely a fuel filter. Could be an ignition module getting hot. Could be compression related with that many miles. When everything (valves, rings) cools and contracts, the compression is back.
2. 0 Oil pressure indicates bad sending unit, bad pump, or worn out bearings. The stablizer gives the same effect as using 20W-50 oil. You are thicker so you see some pressure. You really are not accomplishing anything. It breaks down too. That is why the inconsistant readings.
3. The KNOCK is a rod. It is warming up and hitting the block. This goes with the oil issues and the not starting due to lack of compression.
4. Is this truck worth $1900? Remember, everything else also has 200,000 miles on it. Tranny, transfer case, drive shafts, axles, suspension, you may put a motor into a worn out truck. You could sell the truck, take the money and your $1900 and get a newer Yukon or Suburban. A new motor does not give you a new intake manifold, A/C compressor, power steering pump, alternator, starter, torque convertor, new injectors, distributor, radiator, or many other parts. These are costly repairs, and they are coming. It is up to you. You virtually are paying $1900 for a worn out 20 year old truck. Just my opinion.
Hope this helps.
C J S
